Issue: 19480801

Sunday, August 1, 1948
Aug. 1948
2
True
153
Monday, December 29, 2014

Articles
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POPULAR SCIENCE
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PopularScience_19480801_0153_002_0001.xml
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0_2,1
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National Educational Alliance Inc.
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National Educational Alliance Inc.
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PopularScience_19480801_0153_002_0002.xml
masthead
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2
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POPULAR SCIENCE
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PopularScience_19480801_0153_002_0003.xml
tableOfContents
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CONTENTS FOR AUGUST, 1948
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PopularScience_19480801_0153_002_0004.xml
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3
3
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19480801_0153_002_0005.xml
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4
4
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WINCHESTER: HI-POWER SPOTLIGHT
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WINCHESTER
HI-POWER SPOTLIGHT
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PopularScience_19480801_0153_002_0006.xml
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5
5
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PERFECTION STOVE CO.
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PERFECTION STOVE CO.
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PopularScience_19480801_0153_002_0007.xml
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6
6
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BELL TELEPHONE LABORATORIES
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BELL TELEPHONE LABORATORIES
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PopularScience_19480801_0153_002_0008.xml
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7
7
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LASALLE Extension University
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LASALLE Extension University
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PopularScience_19480801_0153_002_0009.xml
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8
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The ROSICRUCIANS
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The ROSICRUCIANS
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PopularScience_19480801_0153_002_0010.xml
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8
8
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KANSAS CITY SCHOOL OF WATCHMAKING
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KANSAS CITY SCHOOL OF WATCHMAKING
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PopularScience_19480801_0153_002_0011.xml
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8
8
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COYNE ELECTRICAL & RADIO SCHOOL
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COYNE ELECTRICAL & RADIO SCHOOL
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PopularScience_19480801_0153_002_0012.xml
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9
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AUDEL
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AUDEL
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PopularScience_19480801_0153_002_0013.xml
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10
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WYPE CORP.
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WYPE CORP.
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PopularScience_19480801_0153_002_0014.xml
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11
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National Radio Institute
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National Radio Institute
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PopularScience_19480801_0153_002_0015.xml
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12
12
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EDMUND SALVAGE COMPANY
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EDMUND SALVAGE COMPANY
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PopularScience_19480801_0153_002_0016.xml
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12
12
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Christy Supply Co.
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Christy Supply Co.
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PopularScience_19480801_0153_002_0017.xml
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12
12
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BLATT
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BLATT
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PopularScience_19480801_0153_002_0018.xml
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12
12
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MAXILUME COMPANY
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MAXILUME COMPANY
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PopularScience_19480801_0153_002_0019.xml
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13
13
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DeFOREST'S TRAINING, INC.
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DeFOREST'S TRAINING, INC.
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PopularScience_19480801_0153_002_0020.xml
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14
14
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SPRAYBERRY ACADEMY OF RADIO
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SPRAYBERRY ACADEMY OF RADIO
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PopularScience_19480801_0153_002_0021.xml
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15
15
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Advertisement
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PopularScience_19480801_0153_002_0022.xml
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16
16
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PYROIL COMPANY
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PYROIL COMPANY
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PopularScience_19480801_0153_002_0023.xml
article
16
16,18,20,22
Letters
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Letters
PS in Safety Program
What a Memory!
Old Spikes with a New Twist
Patience Proves Its Virtue
Radioisotopes for World Peace
Science vs. Art
More on Red and Green Air
One on Galileo
Underwater Radar All Wet
Quick Answer
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Sir: I would like your permission to make about thirty photostatic copies of the article “Danger 115 Volts,” which appears on pages 186 to 189 of the January issue of POPULAR SCIENCE. These copies would be for distribution among employees in our electrical department as part of our safety program.
PopularScience_19480801_0153_002_0024.xml
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17
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Advertisement
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PopularScience_19480801_0153_002_0025.xml
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18
18
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NATIONAL SCHOOLS
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NATIONAL SCHOOLS
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PopularScience_19480801_0153_002_0026.xml
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19
19
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VICTOR J. EVANS & Co.
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VICTOR J. EVANS & Co.
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PopularScience_19480801_0153_002_0027.xml
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20
20
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Postal Life Insurance Company
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Postal Life Insurance Company
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PopularScience_19480801_0153_002_0028.xml
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21
21
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19480801_0153_002_0029.xml
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22
22
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GROBAN SUPPLY CO.
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GROBAN SUPPLY CO.
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PopularScience_19480801_0153_002_0030.xml
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23
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GROBAN SUPPLY CO.
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GROBAN SUPPLY CO.
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PopularScience_19480801_0153_002_0031.xml
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24
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Advertisements
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PopularScience_19480801_0153_002_0032.xml
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25
25
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Milwaukee School of Engineering
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Milwaukee School of Engineering
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PopularScience_19480801_0153_002_0033.xml
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26
26
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Advertisements
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PopularScience_19480801_0153_002_0034.xml
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27
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NATIONAL SCHOOLS
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NATIONAL SCHOOLS
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PopularScience_19480801_0153_002_0035.xml
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28
28
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Advertisements
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PopularScience_19480801_0153_002_0036.xml
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29
29
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TECHNICAL CRAFTS CORP.
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TECHNICAL CRAFTS CORP.
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PopularScience_19480801_0153_002_0037.xml
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30
30
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Advertisements
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PopularScience_19480801_0153_002_0038.xml
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31
31
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RADIO TRAINING ASSOCIATION OF AMERICA
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RADIO TRAINING ASSOCIATION OF AMERICA
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PopularScience_19480801_0153_002_0039.xml
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32
32
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Advertisements
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PopularScience_19480801_0153_002_0040.xml
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33
33
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INDUSTRIAL TRAINING INSTITUTE
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INDUSTRIAL TRAINING INSTITUTE
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PopularScience_19480801_0153_002_0041.xml
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34
34
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Advertisements
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PopularScience_19480801_0153_002_0042.xml
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35
35
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AMERICAN SCHOOL
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AMERICAN SCHOOL
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PopularScience_19480801_0153_002_0043.xml
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36
36
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Advertisements
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PopularScience_19480801_0153_002_0044.xml
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37
37
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CHICAGO TECHNICAL COLLEGE
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CHICAGO TECHNICAL COLLEGE
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PopularScience_19480801_0153_002_0045.xml
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37
37
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LEATHER-NEW PRODUCTS
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LEATHER-NEW PRODUCTS
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PopularScience_19480801_0153_002_0046.xml
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37
37
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MORRISON CRAFTERS
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MORRISON CRAFTERS
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PopularScience_19480801_0153_002_0047.xml
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38
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Advertisements
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PopularScience_19480801_0153_002_0048.xml
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39
39
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U. S. School of Music
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U. S. School of Music
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PopularScience_19480801_0153_002_0049.xml
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39
39
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Advertisement: PULVEX FLEA POWDER
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PULVEX FLEA POWDER
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PopularScience_19480801_0153_002_0050.xml
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39
39
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SANDEE MUFFLER CO.
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SANDEE MUFFLER CO.
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PopularScience_19480801_0153_002_0051.xml
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39
39
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CALIFORNIA TECHNICAL PRODUCTS CO.
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CALIFORNIA TECHNICAL PRODUCTS CO.
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PopularScience_19480801_0153_002_0052.xml
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Advertisements
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PopularScience_19480801_0153_002_0053.xml
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41
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MoToR Book Dept.
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MoToR Book Dept.
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PopularScience_19480801_0153_002_0054.xml
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42
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Advertisements
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PopularScience_19480801_0153_002_0055.xml
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43
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Commercial Trades Institute
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Commercial Trades Institute
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PopularScience_19480801_0153_002_0056.xml
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44
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Advertisements
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PopularScience_19480801_0153_002_0057.xml
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Advertisements
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PopularScience_19480801_0153_002_0058.xml
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Advertisements
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PopularScience_19480801_0153_002_0059.xml
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47
47
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MICHIGAN TECHNICAL INSTITUTE
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MICHIGAN TECHNICAL INSTITUTE
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PopularScience_19480801_0153_002_0060.xml
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47
47
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WARNER ELECTRIC CO.
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WARNER ELECTRIC CO.
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PopularScience_19480801_0153_002_0061.xml
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48
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Advertisements
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PopularScience_19480801_0153_002_0062.xml
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49
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AUDEL
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AUDEL
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PopularScience_19480801_0153_002_0063.xml
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49
49
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NATIONAL TRADE SCHOOL
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NATIONAL TRADE SCHOOL
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PopularScience_19480801_0153_002_0064.xml
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Advertisements
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PopularScience_19480801_0153_002_0065.xml
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NELSON-HALL CO.
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NELSON-HALL CO.
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PopularScience_19480801_0153_002_0066.xml
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52
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Advertisements
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PopularScience_19480801_0153_002_0067.xml
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53
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ELECTROCAR CO.
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ELECTROCAR CO.
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PopularScience_19480801_0153_002_0068.xml
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53
53
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YODER MFG. COMPANY: HOLLYWOOD WOLF WHISTLE
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YODER MFG. COMPANY
HOLLYWOOD WOLF WHISTLE
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PopularScience_19480801_0153_002_0069.xml
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54
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STARK’S Dept.
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STARK’S Dept.
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PopularScience_19480801_0153_002_0070.xml
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55
55,56,57,58,59,60,61,62,63,64,65,66,67
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Classified Opportunities
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PopularScience_19480801_0153_002_0071.xml
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68
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POPULAR SCIENCE PUBLISHING CO.
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POPULAR SCIENCE PUBLISHING CO.
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PopularScience_19480801_0153_002_0072.xml
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69
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Johnson Smith Co.
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Johnson Smith Co.
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PopularScience_19480801_0153_002_0073.xml
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70
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U. S. Army
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U. S. Army
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PopularScience_19480801_0153_002_0074.xml
article
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71
The Voice of Science
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Machinist or Scientist ?
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CAN you tell by looking at this man whether he is a machinist or a scientist? Whatever you say, you will be right—because this man is both! He went to work for General Electric back in ’22 as a drill-press operator. His first job in the Research Lab was as a machinist.
PopularScience_19480801_0153_002_0075.xml
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72
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RADIO CORPORATION of AMERICA
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RADIO CORPORATION of AMERICA
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PopularScience_19480801_0153_002_0076.xml
article
73
73
Science News
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Light Stopped • • •
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This picture—uninteresting at first glance—is one of the most important photographs ever taken: the first published portrait of a ray of light stopped in its tracks. Each white dot is the reflection of the same beam of light in one of a series of mirrors spaced along an inclined board (inset).
PopularScience_19480801_0153_002_0077.xml
article
74
74,75,76,77,78,79,80,81
Aviation
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What Can Our Bombers Do Now?
America's foremost authority on strategic air power tells how amazingly bombing has changed since World War II.
How Far Could Our Bombers Go?
Engines vs. Distance
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Herbert Johansen
IT TOOK the United States and its allies a long time to bomb the will and ability to fight out of Germany and Japan. Tens of thousands of planes and advanced bases all over the world were needed. You’ll never see anything like that again. A few hundred planes will suffice the next time.
PopularScience_19480801_0153_002_0078.xml
article
82
82,83
Inventions
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New Ideas from the Inventors
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Jack Aids Blowouts, Skids. A small wheel in the bottom of this built-in, hydraulic auto jack is designed to act as a temporary support when a blowout occurs. When the jack is lowered further, the wheel recesses into the base, and the car is raised for easy tire-changing.
PopularScience_19480801_0153_002_0079.xml
article
84
84
PS Features
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Iron Horse Trims Its Own Hoofs
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MOTORISTS aren’t the only ones to worry about flat tires. Locomotives get them too. Their great driving wheels scream against the rails in starting, braking, and grinding around curves until flat spots develop. That’s why railroad men are interested in this new method of shaving them smooth again.
PopularScience_19480801_0153_002_0080.xml
article
87
87,88,89
PS Features
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How to Use an Abacus
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PopularScience_19480801_0153_002_0081.xml
article
90
90,91,92
Aviation
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What's New in Aviation
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Longer Hull, Safer Landing. The Martin XP5M-1 flying boat shown above will put to test a new, long afterbody hull. Extended to the extreme end of the plane, this is expected to permit safer landings in rough seas with less pitching and bouncing.
PopularScience_19480801_0153_002_0082.xml
article
93
93
Inventions
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Electric Tee Helps Lazy Golfers
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GOLF pro Joe Mozel has used his head to save his back—and the backs of all the duffers who spend hours just hitting balls for practice. He has invented a machine that automatically tees up golf balls, relieving practicing golfers of the bend-over-and-put-another-ball-on-the-tee routine.
PopularScience_19480801_0153_002_0083.xml
article
94
94
Automobiles
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Midgets Invade Ball Park
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WHEN the Giants go on the road these days, New York’s Polo Grounds does not lapse into its usual sleepy emptiness. Instead, 200 workmen bustle out—and soon the park echoes to the roar of motors. The midgets have moved in. For a new demountable, board track has made it possible to change a ball park into an auto race track in just 18 hours.
PopularScience_19480801_0153_002_0084.xml
article
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97
Aviation
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This is the Plane That Outfiles sound
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PopularScience_19480801_0153_002_0085.xml
article
98
98,99
MECHANICS OF LIVING
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How Ice Cream Gets on a Stick
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PEOPLE have been smacking their lips over ice cream for centuries, but nobody thought of coating it with chocolate and putting a wooden handle on it until about 25 years ago. Now hundreds of millions of pieces of ice-cream-on-a-stick are made— and eaten—every year.
PopularScience_19480801_0153_002_0086.xml
article
100
100,101
Science News
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MARCH OF SCIENCE
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Trapping Cosmic Rays. The two pictures above show the start of an expedition to capture cosmic rays—those tiny particles, smaller than atoms, that constantly rain down on the earth from outer space (PS, July ’48, p. 139). At left, scientists of the Massachusetts Institute of Technology set their trap, a ray counter and a radio transmitter.
PopularScience_19480801_0153_002_0087.xml
article
102
102,103,104,105
Automobiles
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New Garage Has Built-in Efficiency
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R. Lloyd Guyette
DRIVING up to the service entrance of a garage that opened recently in Hartford, Conn., a new customer is surprised to see its massive door lift up before he has so much as sounded his horn. That’s only his introduction to a wonderland of mechanical efficiency that is no more like your corner service station than the Mayo Clinic is like a country doctor’s office.
PopularScience_19480801_0153_002_0088.xml
article
106
106
New Products
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Crane Lifts Big Load
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THIS one-man, mobile Tournacrane carries a 7-ton load and turns on a 20-foot dime. The boom rides up and down on an elevator track, providing a 31-foot reach when fully extended. The track tilts backward to a horizontal position, and can be tipped forward to bring the load over wheels for better weight distribution.
PopularScience_19480801_0153_002_0089.xml
article
106
106
Science at Work
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Invalids Get a Lift
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INVALID patients get a lift—literally—with this Porta-Lift for home or hospital use. One person operating the hydraulic jack at the side can lift a patient into or out of beds, wheelchairs, or automobiles. A seat hanging from an arm at the top of the wheeled stand supports the patient in either a sitting or reclining position.
PopularScience_19480801_0153_002_0090.xml
article
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106
Science at Work
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Machine Weaves Faster
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AN ENDLESS stream of high-speed, steel shuttles replaces the usual single, wooden shuttle in this new Swiss-designed weaving machine. Made by Warner and Swasey, the “rapid-fire” loom has nearly three times the cloth output of ordinary machines.
PopularScience_19480801_0153_002_0091.xml
article
107
107
Automobiles
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Handy Box Aids Driver
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THIS versatile box, shaped to fit a car seat, can do four jobs for a motorist. Closed, it serves as a picnic-lunch box and at the same time as an arm rest for the driver or an elevated seat for Junior. Opened, as above, the hinged cover reveals a vanity mirror that swivels to any angle.
PopularScience_19480801_0153_002_0092.xml
article
107
107
New Products
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Chair Doubles as Lounge
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THIS cross between a deck-chair and a rocker lets you lean back and put your feet on the desk—without a desk. Thanks to the angle in the bottom rails, it can either be used semi-upright or tilted ’wav back, as above. Called the Barwa the chair is said to be scientifically shaped to the natural contour of spine and legs in relaxation.
PopularScience_19480801_0153_002_0093.xml
article
107
107
New Products
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Camp Stove Fits Pocket
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THE new camp stove shown above takes little more room in a sportsman’s pocket than a fishing reel or a box of shotgun shells. When folded (inset) the Taykit measures only 5 by 4½ by 1⅞ in. Set up, with the carrying-case walls pushed out as wind-shields under two sides of a wire grill, it’s big enough for a frying pan, a coffee pot, or a four-quart kettle.
PopularScience_19480801_0153_002_0094.xml
article
107
107
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Baby Cart Has Rockers
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THE Babycar above, was recently shown for the first time at an industrial fair in Holland. The wheels let down to lift it off the rockers, and a handle can be fastened on at the front to pull it by.
PopularScience_19480801_0153_002_0095.xml
article
108
108,109,110
PS Features
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Contour Maps of Men Aid Tailors
Neat Trick if You Can Say It
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[no value]
Paul F. Ellis
MAKING a suit of clothes really fit a modern man’s bulges, slopes, and protrusions is difficult craftwork. But engineering, physics, and optics have been combined now in a Photo-Metric process to help both tailors and their customers.
PopularScience_19480801_0153_002_0096.xml
article
111
111
PS Features
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Trains Get Ferry Ride
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WHEN the giant “jaw” at the right snaps shut, it swallows 30 railway cars. It’s the upper bow section on the Danish ferryboat Fyn (above), which carries railroad cars on the 15-mile run between Nyborg and Korsor. Rising like a drawbridge, the bow permits railroad cars to roll directly from tracks on the dock to tracks on the ferry’s deck.
PopularScience_19480801_0153_002_0097.xml
article
111
111
Science at Work
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Water Shuts Hose Valve
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THE water itself does the work in this self-closing Paul valve for water hoses. The opening into the nozzle is smaller than the valve chamber, so the water must speed up to get through, causing a drop in pressure at the opening. This forces a ball inward against the opening, shutting off the water until the plunger on top is pressed down, pushing the ball away from the opening.
PopularScience_19480801_0153_002_0098.xml
article
111
111
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Tiny Pencil Clips Tie
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LESS than four inches long and only an eighth of an inch thick, this tiny mechanical lead pencil can be worn as a tie clasp. Made by the Slencil Co., of Orange, Mass., it has a long, spring-wire clip on the back that fastens the tie to the shirt. The lead is propelled or retracted by a single knurled roller recessed in a slot in the center of the pencil.
PopularScience_19480801_0153_002_0099.xml
article
111
111
[no value]
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Electric Shoe Shiner
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WANT an easy shoe shine? The Groomaster will meet you half way. Just put on the polish, slip your foot under the whirling buffer, and this portable home shoe-shining machine will do the rest. The eight-inch electric sheepskin buffer works the wax in and polishes at the same time.
PopularScience_19480801_0153_002_0100.xml
article
112
112,113,114,115,116,117,118
[no value]
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Nicklel-Cadmium Battery Lasts as Long as the Car
ADVANTAGES OF NICKEL-CADMIUM BATTERY OVER
New to United States, this European juice box will not crack, freeze, spill acid, or run down when left idle.
LEAD-ACID BATTERY NOW USED IN AUTOMOBILES
HOW NICKEL-CADMIUM AND LEED-ACID BATTERIES WORK
How It Was Born
One Step Beyond Edison
Inventor’s Son Comes to U. S.
Signal Corps Trying It
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[no value]
Harland Manchester
ONE of the greatest headaches of the American driver is his automobile battery. If left untended in storage, it grows green whiskers and dies; if it gets low in sub-zero weather, it is liable to freeze and crack. Jolting on rough roads may break its hard-rubber case, and without frequent drinks of water it ceases to function.
PopularScience_19480801_0153_002_0101.xml
article
119
119
Science at Work
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Giant Press Bales Autos
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THIS gigantic hydraulic press takes whole auto bodies and in one motion crushes them into neat, bite-size morsels for the scrap-hungry mouths of southern California steel furnaces. Designed to speed the salvage of scrap metal, the huge crusher (above) is six feet wide, five feet deep, and 16½ feet long.
PopularScience_19480801_0153_002_0102.xml
article
119
119
New Products
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Glass Blocks Form Wall
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ENTIRE walls or partitions of glass can be easily assembled by simply fitting together these interlocking, double-pane blocks. Called Temprex Duo-Pane, they each consist of two 20-inch-square panes mounted 3⅞ inches apart on a structural aluminum frame.
PopularScience_19480801_0153_002_0103.xml
article
120
120
PS Features
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10-Boy Toy Train Goes 12 m.p.h.
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HERE’S a toy train that kids can actually climb aboard and ride in. A San Fernando, Calif., manufacturer built it for his two sons. They liked it so well that his company, Bowlus-Robertson, is producing more like it for sale. Price: about $1,400.
PopularScience_19480801_0153_002_0104.xml
article
121
121,122
I'd like to see them make...
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I'd like to see them make...
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Everybody has his own pet idea of some gadget he would like to see in general use. What is YOURS? Popular Science will pay $5.00 for each one published. Use government postcards only. Contributions cannot be acknowledged or returned. Transparent fuel lines.
PopularScience_19480801_0153_002_0105.xml
article
123
123,124
PS Features
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Self-Service Museum Puts Curiosity to Work
Super-craftsmen at a Cleveland museum are translating health into push buttons—and visitors do the pushing.
Learning By Doing
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[no value]
George H. Waltz, Jr.
IN A small, well-equipped workshop just off one of Cleveland’s busiest streets, carpenters, artists, and technicians are making health visible. Their shop is part of the famous Cleveland Health Museum. Their job is building unique exhibits for the public to play with—and learn with.
PopularScience_19480801_0153_002_0106.xml
article
129
129,130
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Primitive Survival Lore
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LAST fall, 15 men bailed out of a disabled B-17 over the dense wilderness of the Nicaraguan jungle. Search parties brought out 14, but the last survivor was so badly injured he couldn’t be moved. Then a doctor of the USAF’s Air Rescue Service, Capt.
PopularScience_19480801_0153_002_0107.xml
article
131
131
New Products
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Tractor Has Rear Engine
This One Carries Stilts
Gauge Fits Oil Drum
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ALLIS-CHALMERS has put the cart before the horse in this new farm tractor. Placing the engine behind the seat and mounting implements under the driver, between the front and rear wheels, give him a clear view of his work and make possible the precision tillage needed for truck farming.
PopularScience_19480801_0153_002_0108.xml
article
132
132,133
Science News
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Electrons Now Brighten X Rays
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WHEN a doctor gives you an X-ray examination with a conventional fluoroscope, he sees a dim, greenish-yellow-and-black image on the viewing screen. It is so faint that making out fine details of your internal organs in action is like trying to read a newspaper by moonlight.
PopularScience_19480801_0153_002_0109.xml
article
133
133
Science News
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Tube Detects Movement
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A NEW electronic tube no bigger than a walnut can measure the slightest movement of objects as small as the hairspring of a watch. The object over which it “stands guard” must first be magnetized or have a magnet attached to it, as in the sketch at right.
PopularScience_19480801_0153_002_0110.xml
article
134
134,135
Automobiles
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Gunning the Hot Rods
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Andrew R. Boone
BILL BURKE is an Alhambra, Calif., welder; Don Francisco, a city fireman. They’re not sure just what their car is: it has the chassis and running gear of a Ford roadster, a Mercury engine, and a body made from the wing tank of a P-38 fighter plane.
PopularScience_19480801_0153_002_0111.xml
article
136
136,137
Automobiles
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Do You Know Your '48-49' Car?
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WHAT new automobile has a T-shaped piece of chrome on its grille? If you’ve kept up with car styles, that’s a feature you’ll look for in identifying one 1948 model. Here are front-end views of 12 new cars. By this time, you have seen them all. How many do you recognize?
PopularScience_19480801_0153_002_0112.xml
article
138
138
Science at Work
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Pile Driver Runs Itself
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THIS lightweight German pile driver, now in use at the U. S. Navy’s Port Hueneme Proving Ground, Calif., is its own engine. Weighing only a ton, it is essentially a single-cylinder Diesel engine, with the 1,100pound hammer acting as a piston.
PopularScience_19480801_0153_002_0113.xml
article
138
138
New Products
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To Warm or Cool You
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HAVE a fevered brow you want cooled? Or a tummy ache you want warmed? Either one is possible with this combination ice pack and hot-water bottle. Called Hot-R-Cold Pak it is a folding, wallet-size, plastic pouch containing a special liquid that stays either hot or cold for a long time.
PopularScience_19480801_0153_002_0114.xml
article
138
138
Science News
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Globe measures Light
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SEEING triple? That’s just what engineers at Sylvania Electric want to see when they study the light patterns of lens-type lamps whose beams are too broad for screen projection. They place an opal-glass globe over the lamp to be tested and then put mirrors behind it on both sides.
PopularScience_19480801_0153_002_0115.xml
article
139
139
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“Hat" Maps Head Shapes
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No, THIS isn’t a new creation in ladies’ hats—it’s Bell Telephone Laboratories’ latest gadget for getting the head sizes of its telephone operators. The graduated rods around the semicircular headpiece produce accurate contour maps of any head shapes.
PopularScience_19480801_0153_002_0116.xml
article
139
139
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Billionth Amp Metered
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CURRENTS as small as a billionth of an ampere can be measured with a new RCA microammeter, shown above, designed for such ultra-sensitive jobs as gauging the light emitted by stars. The portable instrument covers the range from a billionth to a thousandth of an ampere.
PopularScience_19480801_0153_002_0117.xml
article
139
139
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Panel Tests Truck Lights
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You won’t see a truck on the road with quite as many rear lights as this one has. Thanks to it, however, “stop” and “turn” signals on other trucks may be improved. General Electric designed the panel to test lights of various colors and brightness.
PopularScience_19480801_0153_002_0118.xml
article
139
139
Science at Work
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Millionth Inch Gauged
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HOLES too small to be measured with ordinary tools can now be gauged with this British device that shoots compressed air through them. The instrument actually measures how much an electric filament is cooled by an air stream escaping through the test hole.
PopularScience_19480801_0153_002_0119.xml
article
140
140,141,142
Science News
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Sun's Daily Signals Direct Radio Traffic
Short-range predictions based on a new discovery enable the world’s radio stations to counter magnetic storms.
[no value]
[no value]
Alden P. Armagnac
FROM an office-building rooftop amid New York’s downtown skyscrapers, J. H. Nelson, radio engineer and official sunspot observer for RCA Communications, Inc., scans the solar disk daily through a six-inch telescope. Making penciled dots on a circular chart, he carefully notes the position of blemishes upon the sun’s face.
PopularScience_19480801_0153_002_0120.xml
article
142
142
Science at Work
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Navy Films Lake Bottom
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USING the self-propelled barge and the photoflash-bulb rig shown below, Navy photographers are studying a submarine dust bowl—Lake Mead, backed up by Boulder Dam on the Colorado River. Photos taken with underwater cameras show them how fast the silt dumped there by incoming water, an estimated 1,400 carloads daily, is robbing the reservoir of water-storage capacity.
PopularScience_19480801_0153_002_0121.xml
article
143
143
Inventions
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Machine Types Simplified Music
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DOZENS of inventors have wrestled with the problem of devising a typewriter to write music. None so far has come up with a solution simple enough to displace the pen-and-ink hand method still used by commercial publishers. Failure by others, however, hasn’t daunted Dr. Floyd Fire-stone, Washington acoustical engineer, who has invented the music typewriter pictured at the top of this page.
PopularScience_19480801_0153_002_0122.xml
article
144
144
Inventions
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New Gauge Speeds Wheel Alignment
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ALIGNING a car’s front wheels is a precision job. The best way to see whether they’re exactly right is to measure how they behave when spinning at road speed with the car’s weight on them. A device that does this in 20 seconds has been developed by the Ford Motor Co. and installed as the last stop on assembly lines now turning out its ’49 models.
PopularScience_19480801_0153_002_0123.xml
article
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145
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Windshield of Conducting Glass Melts Off Ice
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ICED windshields may seem no problem as yet, but with an eye to winter, Libbey-Owens-Ford Glass Co. is developing electrically heated ones. Perfected for war use, the safety-glass sandwich has an almost invisible film of stannic oxide on an inside surface.
PopularScience_19480801_0153_002_0124.xml
article
145
145
New Products
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Rear-Engine Car Has Bio Body
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AN UNUSUAL feature of this 500-lb. racer is the front spring assembly, giving knee action through an overhead transverse spring from which the chassis is slung. The car, built by the Monaco Motor and Engineering. Co., Watford, England, has a wheel base of only 5'.
PopularScience_19480801_0153_002_0125.xml
article
145
145
Automobiles
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Light Warns of Low Oil Supply
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AN AMBER dash light flashes on when engine oil drops 1 qt. below normal with this device. If the oil level drops 2 qt., a red light shines. Operating by the weight or head of oil in the crankcase on a resilient diaphragm, the Oil-Dicator consists of a unit that replaces the oil drain plug and a dash fitting.
PopularScience_19480801_0153_002_0126.xml
article
146
146,147
Automobiles
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Hints From the Model Garage
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Make Your Own Polishing Pad. If you own an electric drill, it’s a simple job to assemble a polishing attachment. Cut a 5" disk from ½" plywood, drill and counterbore it, and attach a shaft cut from a ¼" bolt. Pad the face with several layers of flannel.
PopularScience_19480801_0153_002_0127.xml
article
148
148,149,150,151
Automobiles
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Gus Gets Broken in by a New Helper
When Stan Hicks graduates to a full-fledged mechanic and a new grease monkey comes to the Model Garage, time hangs heavy on extra hands.
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Martin Bunn
“HEY, mister—what should I do now?” Gus Wilson, flat on his back under the jacked-up rear end of George Knowles’s car, looked up at Greg Jones, the Model Garage’s new grease monkey. “Well,” he suggested, “you might sweep out the shop.” “I’ve done that,” Greg told him.
PopularScience_19480801_0153_002_0128.xml
article
152
152,153
Automobiles
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Adding Vacuum Brakes to a Trailer
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STRIPPED down to serve as a trailer, the old auto chassis above still has its hydraulic brakes but they’re now applied by vacuum instead of by foot pressure. The intake manifold of the towing car provides the vacuum. A vacuum-line connector designed for trailer trucks allows quick coupling or uncoupling of the trailer.
PopularScience_19480801_0153_002_0129.xml
article
153
153
Automobiles
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Simple Light Checks Timing
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HERE’S a simple timing light that will help you check and adjust the setting of distributor points. It also serves as a handy trouble light. It was made by soldering the socket of a single-contact parking-light bulb to the pivoting end of a storage battery clip.
PopularScience_19480801_0153_002_0130.xml
article
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154
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Jeep Gets the Full Treatment
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SOME surprising changes can take place when imaginative mechanics get hold of a Jeep ©. This one is the off-duty work of two members of the U. S. Air Force stationed in Japan. Buying a Jeep for $335, they discarded the old body and planed down the cylinder head to boost compression.
PopularScience_19480801_0153_002_0131.xml
article
154
154
Automobiles
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British Test Gas Turbine as Auto Power Plant
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DESIGNED especially for use in passenger vehicles, this gas turbine is now undergoing tests in England. Adapted from aircraft gas turbines, it weighs only 300 lb., develops 160 hp., and burns almost any oil as fuel. The British designers have given no hint, however, whether it overcomes two problems encountered by other experimenters—objectionable exhaust blast and excessive fuel consumption (PS, Nov. ’47, p. 128).
PopularScience_19480801_0153_002_0132.xml
article
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155
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Mechanics and Handicraft
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PopularScience_19480801_0153_002_0133.xml
article
156
156
Home Mechanics & Handicraft
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Map Measurer Rolls Off the Miles
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ROLLED along a map to follow curved highways or irregular small-boat courses, this measurer gives you the distance in inches that it’s moved. Changing inches to miles is then just a quick calculation with the inch scale on the map. You could, of course, calibrate the gadget to read distance directly, on maps of the same scale.
PopularScience_19480801_0153_002_0134.xml
article
157
157
Home Mechanics & Handicraft
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Table Has Sliding Top
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THE most important consideration in building this sliding-top coffee table is exactness. Accurate cutting and fitting are musts. In the currently popular light maple or birch, this piece is an asset to any room. Sugar, cream, and sandwiches may be served from the compartment with cups and saucers on the extended leaves.
PopularScience_19480801_0153_002_0135.xml
article
157
157
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Rubber Door Stop Used As Pipe Rack
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A RUBBER doorstop, which can be purchased for about a dime, makes a handy rack for a pipe, as shown at the right. The stop may be used alone as a pipe rest, or it and an ash tray may be screwed to a wooden base.—H. Klein, Pittsburgh, Pa.
PopularScience_19480801_0153_002_0136.xml
article
158
158
Home Mechanics & Handicraft
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Desk Dinosaur Minds the Mail
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HERE’S another prehistoric horror, scaled down to a safe 3½" and mounted to decorate a letter rack. This big lizard—a stegosaurus—was an early dinosaur. He exceeded a modern elephant in bulk. To give you an idea of his size, the largest of the spiny fins on his back was 3' high.
PopularScience_19480801_0153_002_0137.xml
article
158
158
Home Mechanics & Handicraft
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Pin Vise and String Drill Holes in Tight Quarters
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NEXT time you want to drill a hole in a spot where there is barely enough room to move a hand, try winding a few feet of stout string around a pin vise. You’ll also need a pad or button with a short shank to fit loosely into the hollow vise body. Apply pressure on the button as shown and pull the string.
PopularScience_19480801_0153_002_0138.xml
article
159
159
Home Mechanics & Handicraft
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Picnic Bag keeps Food Cold
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HERE’S what you need to make this lightweight, picnic refrigerator: A canvas beach bag, an ice bag, a pound roll of nonsterile cotton, and a plastic-film table-cloth cover. Make paper patterns of the end, side, and bottom of the beach bag, cutting them about I" larger all around.
PopularScience_19480801_0153_002_0139.xml
article
160
160,161
Home Mechanics & Handicraft
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Paint It with Rayon
With dyed flock, you can give any surface a colorful, velvety finish.
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PHONOGRAPH turntables aren’t naturally fur-bearing. That velvetlike surface on them is a finish called flock. It consists of tiny bits of fiber—some 250,000 to a square inch—standing on end in a coating of adhesive. Flock finishing is now within the reach of any craftsman.
PopularScience_19480801_0153_002_0140.xml
article
162
162
Home Mechanics & Handicraft
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Ball-Point Pen Makes Stylus
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AN EMPTY ball pen or cartridge—the type with the ball built in—is worth keeping as a smooth-acting, round-point stylus. Craftsmen can emboss leather or metal foil with it, as above. It’s also fine for drawing on duplicating stencils. Used with carbon paper, it makes dark, clear copies without smudging the original lines as a pencil will.
PopularScience_19480801_0153_002_0141.xml
article
162
162
Mechanics & Shopwork
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Big Chisel Forged from Spring
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A KEEN, durable chisel, especially good for tree surgery, may be made from a broken auto spring leaf. Grind the broken end to the desired shape. Then in a forge or furnace soften the metal for blacksmithing into a gouge contour. At the other end of the spring section, roll the edges together to form a suitable shank for hammering.
PopularScience_19480801_0153_002_0142.xml
article
162
162
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Envelope Holds Magazines
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DID YOU ever hesitate to buy a magazine as you rushed for a train because you already had your hands full with bags and a coat? A large Manila envelope, taped to the side of your bag, makes a fine emergency carrier for a book or magazine. You can buy the envelope in any stationery store.
PopularScience_19480801_0153_002_0143.xml
article
162
162
New Products
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Cord Has Soft Bubber Plugsh
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AN EXTENSION cord set with an unbreakable, three-way plug and attachment plug of soft rubber has been announced by the United States Rubber Company. Intended for general household use, the set is produced in lengths of 6', 9', and 15' of No. 18 rubber-insulated wire.
PopularScience_19480801_0153_002_0144.xml
article
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162
Home Mechanics & Handicraft
[no value]
Worm HolesProduced by Burr
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[no value]
[no value]
[no value]
WORM holes add an authentic air to antique copies. A discarded dentist’s burr, in a chuck turning at 3,500 r.p.m. or faster, will produce realistic ones. Vary depth and direction as shown.—Reginald O. Lissaman, Brandon, Man.
PopularScience_19480801_0153_002_0145.xml
article
163
163
Home Mechanics & Handicraft
[no value]
Typing Table Has Built-in Wastebasket
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[no value]
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Two things that go together like ham and eggs are a typewriter and a wastebasket. Whether you’re a professional writer or whether you just use your typewriter for occasional correspondence, you’ll still need a wastebasket nearby. The combination pictured above is another practical solution devised by the Editor for his own use.
PopularScience_19480801_0153_002_0146.xml
article
163
163
Home Mechanics & Handicraft
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Thumb Indexing Phone Book with Engraving Tool
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WITH an electric engraving tool of the vibrator type you can thumb-index phone books, catalogs, and other volumes. Decide how many notches are required. Then measure the long edge and divide it for the needed number. Cut the notches in the pages preceding each letter.
PopularScience_19480801_0153_002_0147.xml
article
164
164,165,166
PS Features
[no value]
Model Jet Planes Top 140 m.p.h.
Pulse jets find increased favor with modelers as experimenters work bugs out of war-developed power plants.
[no value]
[no value]
J. H. Lemelseon
R. F. Probstein
MODEL builders are switching to jets. In increasing numbers, enthusiasts are fitting miniature planes, boats, and racing cars with small jet engines—the same type that powered the Nazi buzz bombs, These little power plants measure less than 2' long and are from 2" to 3" in diameter.
PopularScience_19480801_0153_002_0148.xml
article
167
167
Home Mechanics & Handicraft
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Whatnot Shelf Lighted from Below
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KNICKKNACKS, especially glass objects, are displayed effectively on this fluorescent-lighted shelf. The dimensions in the drawing are for a 14-watt lamp. However, by simply increasing the length, a 15-or 20-watt lamp may be used. The stock is ⅜" white pine.
PopularScience_19480801_0153_002_0149.xml
article
168
168,169
Keeping the Home Shipshape
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Keeping the Home Shipshape
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Eliminate tedious trimmning close to a fence by keeping long, narrow boards under it to stop the growth of grass there. Replace them after using the lawn mower. Brackets for this small kitchen shelf are cut from a single wooden coat hanger. The top is a piece of ¼" plywood. Drill holes for screws and for the dowel and finish with enamel.
PopularScience_19480801_0153_002_0150.xml
article
170
170,171
AIDS TO MODERN LIVING
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AIDS TO MODERN LIVING
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[no value]
Squeezer Is Mixer Too. The Juice-A-Shake combines squeezing, straining, and shaking in one compact unit. It may be used to make orange juice, milk shakes, or cocktails. Eggs also may be prepared for scrambling or cream whipped in the three-piece plastic juicer.
PopularScience_19480801_0153_002_0151.xml
article
172
172,173,174
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[no value]
New Gifts Old China
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[no value]
[no value]
Bill Luther
AN ASHTRAY, table lighter, and double-decked candy dish make up this different and attractive cocktail threesome. To construct them you’ll need a lathe, a hand grinder, and some old china ware. I used two plates of different diameters, a sauce dish, and a saltcellar.
PopularScience_19480801_0153_002_0152.xml
article
174
174
[no value]
[no value]
Stamp-Card Pockets Formed from Mending Tape
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STOCK cards used by stamp collectors can be made up from file cards and 1" transparent mending tape. Cellulose tapes that stick without wetting are harder to use. For each pocket, cut a strip of tape the width of the card. Score it with a pin or knife point as shown and fold along the scored line.
PopularScience_19480801_0153_002_0153.xml
article
175
175
What's Your Ingenuity Quotient?
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What's Your Ingenuity Quotient?
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[no value]
At last I know when to empty the ice-box pan. I rigged a doorbell and a dry cell and placed the ends of the wires just below the rim of the pan. When the water reaches the wires, the bell rings. A dollop of salt in the water helps conductivity.—Leslie Graves, Livingston Manor, N. Y.
PopularScience_19480801_0153_002_0154.xml
article
176
176
Home Mechanics & Handicraft
[no value]
Outboard Stand Built of Pine
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WHEN an outboard motor is not in use, it is best to store it in an upright position. A stand on casters is ideal for this. The motor is held securely yet it is accessible from all angles for cleaning, lubricating, or overhaul work. Random widths of ¾" pine were used to build the stand pictured above.
PopularScience_19480801_0153_002_0155.xml
article
176
176
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Rubber Ball Stops Tent Leaks
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A SPONGE-RUBBER ball cut in half will solve the problem of a leak at the pole spike of a tent. Force a half of the ball over each spike, as shown in the sketch, so it will rest lightly against the canvas. Even if the spike projects through the ball, the soft rubber makes a seal around it.
PopularScience_19480801_0153_002_0156.xml
article
176
176
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Roofing Paper Cut with Wire
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THIS cutter for roofing and building paper is made of four 40" pieces of crating material. Space each pair of slats about ½" apart with a cleat at each end. Hinge one end as illustrated. Attach a steel wire at the other end. To cut, place the paper as shown, close the frame, and pull the wire.
PopularScience_19480801_0153_002_0157.xml
article
176
176
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Lipstick Tube Holds Eraser
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A DISCARDED lipstick tube makes a dust-tight holder for a draftsman’s eraser. First clean any remaining lipstick from the holder. Then select a good-quality eraser and, with a razor blade, whittle it to snugly in the retractable section of the tube.
PopularScience_19480801_0153_002_0158.xml
article
177
177
PS Features
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Famous Locomotives Carved in Wood and Ivory
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A HALF century ago neighbors referred to Ernest Warther as “that boy who whittles.” Today, at 63, Mr. Warther still is whittling. Carving scale models of locomotives is a full-time business with him now. His models, tracing the evolution of transportation on rails, reflect the skill and patience of a master craftsman.
PopularScience_19480801_0153_002_0159.xml
article
178
178,179,180,181
Mechanics & Shopwork
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Working in the Round with Hand Toots
Care is the principal ingredient of well-out circles and holes, hut these tips on technique may also help.
Marking the Centerline
Sawing a Circle
Smoothing the Edge
Inside Circles
Boring a Hole
Keeping Bits Sharp
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[no value]
Edwin M. Lore
FLAT surfaces and square edges are the bedrock of woodworking craftsmanship. But like the human skeleton or the framework of a building, they frequently gain in beauty by being concealed or covered. Previous articles in this series discussed the uses of bevels, chamfers, and recesses in relieving the monotony of squared edges.
PopularScience_19480801_0153_002_0160.xml
article
182
182
NEW TOOLS
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NEW TOOLS
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Brazing Kit Has Heat Chamber. Offered by the American Products Corp., Chicago, this compact outfit contains all necessary materials and equipment for light bench brazing. The heat-retaining chamber, pinned together of asbestos board, permits handling fair-sized jobs with a small torch.
PopularScience_19480801_0153_002_0161.xml
article
183
183
Mechanics & Shopwork
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Husky Little Screwdriver Folds to Pocket Size
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ALTHOUGH only about the size of a penknife, this folding screwdriver is rugged enough for really heavy work. The blade is sandwiched between two pieces of tapered steel that may be used as blades themselves. With a hacksaw, thin abrasive disk, or slitting saw in a milling machine, split lengthwise a 4" piece of ½" drill rod.
PopularScience_19480801_0153_002_0162.xml
article
184
184,185
NEW SHOP IDEAS
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NEW SHOP IDEAS
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Mill Makes Screws. Modelmakers and others who occasionally have to make up a few special screws will find hollow end mills a great convenience. They are particularly useful in making small screws— 4-40, 3-48, 2-56, and the like. To make a mill, chuck a length of drill rod, face, and centerdrill the end.
PopularScience_19480801_0153_002_0163.xml
article
186
186,187
Mechanics & Shopwork
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Making Hollow Punches to Order
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A SET of hollow punches, besides Being a useful addition to any shop, is an interesting lathe project. The tools are used for cutting neat holes in many materials from thin sheet metals to leather and paper. The most commonly used raw stock is tool-steel rod that can be hardened and tempered by heat treatment.
PopularScience_19480801_0153_002_0164.xml
article
187
187
Mechanics & Shopwork
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Hand Stapler for Booklets
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OWNERS of duplicating machines or small print shops without commercial stapling machines will find this inexpensive setup satisfactory for folders and booklets. Alter a hand stapler as shown, retaining the anvil. Solder the anvil in a recess cut in the 45-deg. angle iron.
PopularScience_19480801_0153_002_0165.xml
article
187
187
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Tube Makes Toggle Bolt
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HERE’S a blind bolt for attaching parts to walls, pipes, or other spots where both ends of a bolt are not accessible. Notch an appropriate length of copper tubing as shown. Insert from the notched end a slightly longer bolt with a head about the same diameter as the outside of the tube.
PopularScience_19480801_0153_002_0166.xml
article
188
188,189,190
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Homemade Cut-Off Wheel Slices Steel
This sweat-saving shop tool will put cobwebs on your hacksaw. It’ll chew through almost anything you feed it.
PAINTING ALUMINUM
[no value]
[no value]
Jack Mellinger
IF YOU’VE recently muscled your way through a big chunk of metal with a hacksaw, you’ll appreciate this cut-off wheel. The thin abrasive disk will chew its way through angle stock or pipe in a matter of seconds, leaving a smooth cut. In our shop we’ve also used it to trim flowerpots, cut armored cable, rough out radio panels and chassis, and whack off extra metal from castings.
PopularScience_19480801_0153_002_0167.xml
article
191
191
Home Mechanics & Handicraft
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Porch Seat Keeps You in the Swing
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THIS low-slung, comfortable swing seat will make any shady spot on a lawn or porch more inviting. It’s simple enough to be built in a home workshop equipped with a circular saw; a bandsaw or jigsaw for cutting the contoured slats will also help.
PopularScience_19480801_0153_002_0168.xml
article
192
192,193,194
PS Features
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How to Select a Car-Top Boat
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J. A. Emmett
IF YOU’RE thinking of buying or building a boat for car-top carrying, here’s a word of caution. You can carry any boat that’s light enough for easy handling, but unless it’s designed especially for such use you’ll probably come out on the short end of the deal.
PopularScience_19480801_0153_002_0169.xml
article
195
195,196,197
Photography
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Compact Enlarger Felds Fine Prints
It’s equipped with condensers and handles any negative up to 2¼" by 2¼".Gear focusing gives vernier sharpness.
[no value]
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Leonard J. Bogert
FOCUSED with a rack-and-pinion adjustment, this condenser enlarger gives consistently sharp prints. As dimensioned here, it accepts any negative up to 2¼" by 2¼". This maximum could be raised to 2¼" by 3¼", however, simply by installing larger condensers and increasing the film-holder apertures.
PopularScience_19480801_0153_002_0170.xml
article
198
198,199
Photography
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PHOTO IDEAS AND EQUIPMENT
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Computer Built in Camera. This new camera, offered by the Eastman Kodak Company, features a built-in exposure computer on the back. It also has a flash synchronizer and an optical eye-level view-finder. The lens is f/4.5. Shutter speeds range from 1/10 to 1/200 second, plus time and bulb.
PopularScience_19480801_0153_002_0171.xml
article
200
200
Photography
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NEWS IN ELECTRONICS
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Ceramic Made Piezoelectric. A polarization treatment developed by the Sonotone Corporation, Elmsford, N. Y., imparts piezoelectric properties (the ability to convert mechanical pressure into electrical impulses) to titanate, a man-made ceramic.
PopularScience_19480801_0153_002_0172.xml
article
201
201,202,203,204,205
Radio & Electricity
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Tunning Eye Makes Old Radios Look Up
Bring your radio up to date by giving it eye-sharp tuning plus freedom from blasting. Here’s how for most receivers.
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William Norton
HARSH background noises that come through when a radio dial isn’t properly set won’t spoil your listening if you tune by eye. Sounds may fool the ear, but there’s no deceiving an electron-ray indicator tube. When the eye squints down to its narrowest angle, you know you’re on the beam.
PopularScience_19480801_0153_002_0173.xml
article
206
206
Radio & Electricity
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External Speaker Adds Uses to Your Auto Radio
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GIVE a loudspeaker enough cord and you can hang it on a nearby limb or simply place it on the ground beside you when you get out of an auto to loll in the shade. For those many times when you are just far enough away from a car for its radio to be of no use, this extension speaker is the perfect answer.
PopularScience_19480801_0153_002_0174.xml
article
206
206
Radio & Electricity
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New Antennas Chase "Ghosts"
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TELEVISION and FM frequencies, with their interference problems from terrain or buildings, are bringing a crop of new antennas. A roof antenna for automobile communication systems, made by L. S. Brach Mfg. Corp., Newark, is shown in Fig. 1.
PopularScience_19480801_0153_002_0175.xml
article
207
207
New Products
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Implement Carrier Is Built Like Truss Bridge
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LOOKING like a single-span truss bridge, this carrier transports heavy farm implements across fields and over highways. Four ratchet spools permit one man to lift a two-ton load into riding position. Chains carrying the load are wound over the spools.
PopularScience_19480801_0153_002_0176.xml
article
207
207
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Wire Frames Protect Flowers
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SIMPLE guards to protect flowers and young shrubs may be made from small pieces of lumber and chicken wire. Staple the wire inside the frame and set the legs a few inches in the ground. Paint the frames white.—Bernard Matzen, Napa, Calif.
PopularScience_19480801_0153_002_0177.xml
article
207
207
Home Mechanics & Handicraft
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Cultivator Uses ¾-hp. Engine
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THIS small garden cultivator was built in about 15 hours, using scrap-iron parts and welded construction. The distance between the wheels may be varied from 12" to 20", enabling me to run it either between rows or to straddle rows. For power, I’ve found a ¾-hp. washing-machine engine satisfactory, though 1¼ hp. might be even better.
PopularScience_19480801_0153_002_0178.xml
article
207
207
New Products
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Rake Used with Light Tractor
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THIS wheel-less, 390-lb. dump rake has 28 spring-steel teeth that provide a spread of 10'. The implement, designed for use with light tractors equipped with a hydraulic lift and a three-point hookup, is made by the General Corporation, of Dallas, Tex.
PopularScience_19480801_0153_002_0179.xml
article
208
208,209
Mechanics & Shopwork
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Hand GrinderIs a One-Tool Workshop
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HELD in your hand, a small motor tool is often tough to manage. It takes real practice to make controlled freehand cuts; and the work almost never shows the line-splitting uniformity expected of power tools. The fixture shown on these pages will put an end to that.
PopularScience_19480801_0153_002_0180.xml
article
210
210
Home Mechanics & Handicraft
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TwoWay Latch Opens Linen Chest
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THIS roomy linen cabinet has two unusual features: a hand or foot-operated latch and a storage box built on the inside of one of the doors. The storage box is handy for miscellaneous small articles, whether you keep the cabinet in the bathroom or a bedroom, or even the kitchen.
PopularScience_19480801_0153_002_0181.xml
article
210
210
New Products
[no value]
Has Hidden Pipes
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A FUSIBLE sprinkler, with pipes concealed in the ceiling, has been introduced by the Grinnell Company, Inc., of Providence, R. I. The automatic sprinkler was especially designed for rooms where the decorative effect would be spoiled by exposed pipes along the ceiling.
PopularScience_19480801_0153_002_0182.xml
article
211
211
Home Mechanics & Handicraft
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Drill Held in Collet by Wires
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I WANTED tO drill some No. 80 holes but couldn’t find a chuck that would close on such a small drill. Finally I inserted three pieces of wire in a ⅛" collet and put the drill in the center. By tightening the collet, the drill was held true. You can find the diameter of the wire you need by subtracting the drill radius from the collet radius.
PopularScience_19480801_0153_002_0183.xml
article
211
211
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Landing Gear of Spring Steel
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SPRING steel from an old phonograph motor or a hacksaw blade makes an ideal landing gear for a gas model plane. I find such a gear absorbs more punishment than the common piano-wire type. Soften the spring by heating, and then shape it. Restore the temper by heating and quenching in oil.
PopularScience_19480801_0153_002_0184.xml
article
211
211
Home Mechanics & Handicraft
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How to Shorten Tiny Screws
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HERE’S a neat way to cut off very small machine screws without damaging the thread or heads. Get a piece of scrap metal the same thickness as the desired screw length. Tap and countersink a hole to suit. Drive the screw in all the way, turn the piece over, and file off the projecting part of the shank.
PopularScience_19480801_0153_002_0185.xml
article
211
211
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Toy Copied from Sand Sailer
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THESE miniature sailers, modeled after the sand sailers raced on southern beaches, are assembled from the kit shown. The toy, which is made principally of plastic, sports a gaily colored sail, smooth-rolling rubber wheels, and a patented nontipping action.
PopularScience_19480801_0153_002_0186.xml
article
211
211
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Plane Control From Saw Grip
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A COMFORTABLE control handle for control-line models may be made from a discarded saw handle, or from a replacement handle. Cut off the grip as shown in the drawing. Use four eyelets to bush the holes in the grip and prevent the steel line from cutting into the wood.
PopularScience_19480801_0153_002_0187.xml
article
212
212,213
Science at Work
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Tests Show Chemical Fire Hazards
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ORDINARILY, an oxygen atmosphere is necessary to keep a fire going. But like most rules, this has its exceptions. When heated, some substances supply their own oxygen and burn without air. Again, fire is usually thought of as being started by a spark or flame.
PopularScience_19480801_0153_002_0188.xml
article
214
214
Home Mechanics & Handicraft
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Raise Your Own Eggs an a Shelf
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You can raise more than enough eggs for a family of four with this hen house that fits in even the smallest of backyards. That is, if the local ordinances in your neighborhood or town permit keeping chickens. Although the house is only 7' long and 16" wide, it accommodates six hens the year round.
PopularScience_19480801_0153_002_0189.xml
article
214
214
Home Mechanics & Handicraft
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Pipe-Instilation Straps Cut from Metal
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WHILE covering pipe with insulation, I ran out of the conventional bands. I made some straps from thin sheet brass which held just as tightly as the conventional type. Cut strips ¾" by 9½". Then slit one end about 1" as shown at the left of the photo.
PopularScience_19480801_0153_002_0190.xml
article
215
215
Home Mechanics & Handicraft
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Jug Hitch Lugs Jug
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THIS hitch is useful in carrying heavy objects such as carboys, auto batteries, and other containers that have projecting rims but no handles. If you use a piece of rope such as that shown in the photographs, you’ll have to tie the two ends together to form one of the handles.
PopularScience_19480801_0153_002_0191.xml
article
215
215
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Handle-Bar Grips Help Tools
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GARDEN tools fitted with rubber grips, as shown in the drawing, are easier to use and easier on your hands. Make the grips by cutting the ends from standard bicycle or motorcycle handle-bar grips. Cement them in place.—Don G. Pittwood Moscow, Id.
PopularScience_19480801_0153_002_0192.xml
article
215
215
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Clothespin Holds Flat Pencil
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A SURE-GRIP clip for a flat carpenter’s pencil can be made from a spring-type clothespin. Remove half the clothespin and slip the pencil in its place. To make sure the pencil won’t slip, cut a notch for the wire as shown in the sketch.—Munro Hill, Elbridge, N. Y.
PopularScience_19480801_0153_002_0193.xml
article
216
216
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Airplane Dope Used as Dye
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WHEN diluted with its thinner, model-airplane dope can be used as the coloring solution for internally carved plastics. Dope is cheaper and easier to obtain than the usual dyes made for the purpose. The colors “take” readily, are richer and more opaque.
PopularScience_19480801_0153_002_0194.xml
article
216
216
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Double Life of Bicycle Tires
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Two bicycle tires that have been badly cut can be combined one inside the other to get nearly the full amount of wear from them. One entire tire is used as a liner for the other, as in the above diagram. Place the casings so the cuts on the inner tire are protected by undamaged sections of the outer tire, while cuts on the inner one are protected by good parts of the outer tire.
PopularScience_19480801_0153_002_0195.xml
article
216
216
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Headlines Clipped for Boat Lettering
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LITERALLY, my boat is a headliner. While I’m not an expert sign painter, I came up with a very professional looking job of lettering across my craft’s stern. All you do is watch the large, page-one headlines in your daily paper, and clip out the necessary letters to spell out the name you want.
PopularScience_19480801_0153_002_0196.xml
article
216
216
Radio & Electricity
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LAYING PARQUETRY FLOORS
[WOODWORKING]
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Good subflooring, surfaced level and with large cracks filled, is required as a backing for a parquetry floor. The hardwood blocks may be ¼" to 1" thick. They may be obtained made up at the mill in assembled squares or in block sets of pieces cut to size and tongue-and-grooved on ends and sides.
PopularScience_19480801_0153_002_0197.xml
advertisement
217
217
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EASTMAN KODAK CO.
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EASTMAN KODAK CO.
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PopularScience_19480801_0153_002_0198.xml
article
218
218
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Louvers "Light" Room
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You can hide unsightly pipes and wiring with a louver-design, false ceiling that can be installed below fluorescent lights. Consisting of transparent plastic louver sections, channels, and fittings, the sections transmit 71 percent of the light, provide uniform illumination.
PopularScience_19480801_0153_002_0199.xml
article
218
218
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Better Metal Sheeting
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WITH a process called Rigidizing thin metal sheeting emerges not only stronger but handsomer. By redistributing the metal in a sheet, the process increases stiffness and at the same time impresses a design. Patented by Rigid-Tex Corp., of Buffalo, N. Y., the process makes steel stiffer by 88 percent, and aluminum, by 108 percent.
PopularScience_19480801_0153_002_0200.xml
article
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218
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Improved Camera Lens
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THE Cine-Ektar 25-mm. lens opens new possibilities of high speed work to the average 16-mm. amateur movie maker. Opening to f/1.4, the Cine-Ektar is said to offer finer definition and resolution than has yet been possible at such a wide opening.
PopularScience_19480801_0153_002_0201.xml
article
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218
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Pad "Files" Notes
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JOT down a note on this desk pad—and it’s permanently filed. The knob at the side of the case turns a roller, which feeds paper over the pad and up and around a plate that fits into the writing bed. To get a clean writing surface, the plate is flipped over.
PopularScience_19480801_0153_002_0202.xml
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219,220,221,222,223,224,225,226
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FORD MOTOR COMPANY
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FORD MOTOR COMPANY
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PopularScience_19480801_0153_002_0203.xml
article
227
227
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Houseboat Propels Itself
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Did you ever want to float down the river like Huck Finn on his raft? Well, now you can do it and take all the comforts of home in this DoALL Houseboat Cruiser. And when you want to go upstream, the vessel’s two 165-hp. Diesel engines can take you 1,000 miles, at 8½ miles an hour, without refueling.
PopularScience_19480801_0153_002_0204.xml
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227
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Graflex, Inc.
[no value]
Graflex, Inc.
[no value]
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PopularScience_19480801_0153_002_0205.xml
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228
228
[no value]
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ATLAS PRESS CO.
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ATLAS PRESS CO.
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PopularScience_19480801_0153_002_0206.xml
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228
228
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SMOOTH.ON MFG. CO.
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SMOOTH.ON MFG. CO.
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PopularScience_19480801_0153_002_0207.xml
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228
228
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SYNCRO SAW CORP.
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SYNCRO SAW CORP.
[no value]
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PopularScience_19480801_0153_002_0208.xml
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228
228
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BING PRODUCTS
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BING PRODUCTS
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PopularScience_19480801_0153_002_0209.xml
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229
229
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Du Pont: DU PONT N°7 POLISH
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Du Pont
DU PONT N°7 POLISH
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PopularScience_19480801_0153_002_0210.xml
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230
230
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PLOMB TOOL CO.
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PLOMB TOOL CO.
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PopularScience_19480801_0153_002_0211.xml
article
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230
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Case Pumps Mattress
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WHEN you want to inflate this new beach mattress, you just screw the tubelike carrying case to the inflation valve on the air mattress—and pump. As shown in the photo, the tube has a built-in pump, and a few strokes fill the mattress with air.
PopularScience_19480801_0153_002_0212.xml
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230
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SPARK PLUG COMPANY
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SPARK PLUG COMPANY
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PopularScience_19480801_0153_002_0213.xml
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231
231
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CHAMPION
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CHAMPION
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PopularScience_19480801_0153_002_0214.xml
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232
232
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Zenith Radio Corp.
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Zenith Radio Corp.
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PopularScience_19480801_0153_002_0215.xml
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232
232
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AMERICAN MACHINE & TOOL CO.
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AMERICAN MACHINE & TOOL CO.
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PopularScience_19480801_0153_002_0216.xml
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232
232
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Stanley Tools
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Stanley Tools
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PopularScience_19480801_0153_002_0217.xml
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232
232
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THOMPSON BROS. BOAT MFG.CO.
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THOMPSON BROS. BOAT MFG.CO.
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PopularScience_19480801_0153_002_0218.xml
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233
233
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DELCO
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DELCO
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PopularScience_19480801_0153_002_0219.xml
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234
234
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GENERAL MOTORS CORPORATION
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GENERAL MOTORS CORPORATION
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PopularScience_19480801_0153_002_0220.xml
article
234
234
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Slide Teaches Students
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GREGG shorthand students can make an accurate check of word outlines by holding a corrective slide, shown in the photo, over their notes. Printed in opaque red ink, the outlines on the Lumarith plastic slide offer a sharp contrast for comparing characters.
PopularScience_19480801_0153_002_0221.xml
article
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234
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Lights Will Not Fail
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THESE portable, battery-operated flood-lamps light up automatically in an emergency. Plugged into any standard outlet, they switch themselves on when regular power fails, and off again when it is resumed. Available in 15and 25-pound sizes, the units have a voltmeter for checking battery strength, and an indicator bulb that burns when the lamps are on.
PopularScience_19480801_0153_002_0222.xml
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235
235
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Magna Engineering Corporation
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Magna Engineering Corporation
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PopularScience_19480801_0153_002_0223.xml
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236
236
[no value]
[no value]
Milwaukee Dustless Brush Co.
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Milwaukee Dustless Brush Co.
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PopularScience_19480801_0153_002_0224.xml
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236
236
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THE CAMPBELL-HAUSFELD CO.
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THE CAMPBELL-HAUSFELD CO.
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PopularScience_19480801_0153_002_0225.xml
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236
236
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CAM-KITS, INC.
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CAM-KITS, INC.
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PopularScience_19480801_0153_002_0226.xml
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236
236
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UPSON BROS., INC.
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UPSON BROS., INC.
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PopularScience_19480801_0153_002_0227.xml
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237
237
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MIDWEST RADIO & TELEVISION CORP.
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MIDWEST RADIO & TELEVISION CORP.
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PopularScience_19480801_0153_002_0228.xml
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238
238
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Advertisement
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PopularScience_19480801_0153_002_0229.xml
article
238
238
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Tally Board with Light
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EYESTRAIN is eliminated when workers in poorly lighted areas use this tally board with lamp attached. Its lighting assembly has a three-volt bulb and three standard flashlight cells, assuring long battery life. Designed for heavy duty, the entire unit weighs only 24 ounces.
PopularScience_19480801_0153_002_0230.xml
article
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238
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Carbon Won’t Curl
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FEWER sheets of carbon paper are wasted by a typist if she uses a new, moisture-resistant type of tissue that will not curl. This is accomplished by applying a coating of Vinylite plastic to the back of each sheet. In addition, the new carbon paper is said to be less likely to tear in handling.
PopularScience_19480801_0153_002_0231.xml
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239
239
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HARRINGTON & RICHARDSON ARMS CO.
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HARRINGTON & RICHARDSON ARMS CO.
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PopularScience_19480801_0153_002_0232.xml
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239
239
[no value]
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DREMEL MFG. CO.
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DREMEL MFG. CO.
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PopularScience_19480801_0153_002_0233.xml
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240
240
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[no value]
Advertisement: Auto Strop RAZOR
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Auto Strop RAZOR
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[no value]
PopularScience_19480801_0153_002_0234.xml
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240
240
[no value]
[no value]
REEVES BROTHERS, INC.
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REEVES BROTHERS, INC.
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PopularScience_19480801_0153_002_0235.xml
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240
240
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DIXIE-WESTERN MANIFOLD CO.
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DIXIE-WESTERN MANIFOLD CO.
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PopularScience_19480801_0153_002_0236.xml
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240
240
[no value]
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K. R. WILSON
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K. R. WILSON
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PopularScience_19480801_0153_002_0237.xml
article
241
241,243,245,247,274
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Twice-TWiceTips
Electric Tester Quickly ‘Candles’ Eggs
Dusty Gray Finish for Oak
A Simple and Automatic Candle-Extinguisher
Old Bill Says . . .
Autogiro Model Drops from Kite String
Ice Used in New Method of Bending Metal Tubes
Wet Clothes Are Quickly Dried on Frame Over Radiator
New Trick for Tool Grinder
Plug Locks In Outlet
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EggS are not always what jan. 1922 they seem. An inspection of the shell gives no idea of the condition of the yolk. Here is an egg tester that will reveal the hidden inner truth. Make a cardboard funnel with the small end just large enough to take the bulb end of an electric flashlight.
PopularScience_19480801_0153_002_0238.xml
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241
241
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Greenlee Tool Co.: GREENLEE
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Greenlee Tool Co.
GREENLEE
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PopularScience_19480801_0153_002_0239.xml
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242
242
[no value]
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Advertisements
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PopularScience_19480801_0153_002_0240.xml
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243
243
[no value]
[no value]
BURD PISTON RING CO.
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BURD PISTON RING CO.
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[no value]
PopularScience_19480801_0153_002_0241.xml
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244
244
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Advertisements
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PopularScience_19480801_0153_002_0242.xml
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245
245
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[no value]
HOBART BROS. CO.
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HOBART BROS. CO.
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[no value]
[no value]
PopularScience_19480801_0153_002_0243.xml
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246
246
[no value]
[no value]
KAYTEE PRODUCTS
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KAYTEE PRODUCTS
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[no value]
[no value]
PopularScience_19480801_0153_002_0244.xml
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246
246
[no value]
[no value]
CONSOLIDATED INDUSTRIES
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CONSOLIDATED INDUSTRIES
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[no value]
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PopularScience_19480801_0153_002_0245.xml
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246
246
[no value]
[no value]
LABAWCO PUMPS
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LABAWCO PUMPS
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[no value]
[no value]
PopularScience_19480801_0153_002_0246.xml
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246
246
[no value]
[no value]
STANDARD TIRE
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STANDARD TIRE
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[no value]
PopularScience_19480801_0153_002_0247.xml
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247
247
[no value]
[no value]
SAFTICYCLES, INC.
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SAFTICYCLES, INC.
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[no value]
PopularScience_19480801_0153_002_0248.xml
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248
248
[no value]
[no value]
Advertisements
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PopularScience_19480801_0153_002_0249.xml
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249
249
[no value]
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LASTING PRODUCTS COMPANY
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LASTING PRODUCTS COMPANY
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[no value]
[no value]
PopularScience_19480801_0153_002_0250.xml
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249
249
[no value]
[no value]
ADVANCE MUFFLER CO.
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ADVANCE MUFFLER CO.
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[no value]
[no value]
PopularScience_19480801_0153_002_0251.xml
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249
249
[no value]
[no value]
INDUSTRIAL GLOVES CO.
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INDUSTRIAL GLOVES CO.
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[no value]
[no value]
PopularScience_19480801_0153_002_0252.xml
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249
249
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[no value]
HARLEY-DAVIDSON MOTOR CO.
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HARLEY-DAVIDSON MOTOR CO.
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[no value]
[no value]
PopularScience_19480801_0153_002_0253.xml
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250
250
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[no value]
Advertisements
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PopularScience_19480801_0153_002_0254.xml
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251
251
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Advertisements
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PopularScience_19480801_0153_002_0255.xml
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252
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Advertisements
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PopularScience_19480801_0153_002_0256.xml
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253
253
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PopularScience_19480801_0153_002_0257.xml
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254
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Advertisements
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PopularScience_19480801_0153_002_0258.xml
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255
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Advertisement
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PopularScience_19480801_0153_002_0259.xml
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255
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Advertisement
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PopularScience_19480801_0153_002_0260.xml
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255
255
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Advertisement
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PopularScience_19480801_0153_002_0261.xml
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256
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PopularScience_19480801_0153_002_0262.xml
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257
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PopularScience_19480801_0153_002_0263.xml
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258
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PopularScience_19480801_0153_002_0264.xml
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259
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PopularScience_19480801_0153_002_0265.xml
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PopularScience_19480801_0153_002_0266.xml
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PopularScience_19480801_0153_002_0270.xml
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PopularScience_19480801_0153_002_0274.xml
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269
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PopularScience_19480801_0153_002_0278.xml
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273
273
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LUSTR-WIPE CORP.
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LUSTR-WIPE CORP.
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PopularScience_19480801_0153_002_0279.xml
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274
274
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PopularScience_19480801_0153_002_0280.xml
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275
275
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PALLEY SUPPLY CO.
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PALLEY SUPPLY CO.
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PopularScience_19480801_0153_002_0281.xml
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276
276
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Advertisement
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PopularScience_19480801_0153_002_0282.xml
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277
277
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BUFFALO RADIO SUPPLY
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BUFFALO RADIO SUPPLY
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PopularScience_19480801_0153_002_0283.xml
article
278
278
I Looked Through the Big Eye
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I Looked Through the Big Eye
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I HAVE just come from enjoying an experience permitted to few laymen. I have looked through the eyepiece of the largest and newest telescope in the world, perched atop Southern California’s Mount Palomar. I got a big kick out of it. And I think you would have, too.
PopularScience_19480801_0153_002_0284.xml
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279
279
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THE ELECTRIC AUTO-LITE COMPANY
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THE ELECTRIC AUTO-LITE COMPANY
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PopularScience_19480801_0153_002_0285.xml
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280
280
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SOUTH BEND LATHE WORKS
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SOUTH BEND LATHE WORKS
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PopularScience_19480801_0153_002_0286.xml