Issue: 19441001

Sunday, October 1, 1944
OCTOBER 1944
4
True
145
Wednesday, December 31, 2014

Articles
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POPULAR SCIENCE
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PopularScience_19441001_0145_004_0001.xml
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GENERAL MOTORS
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GENERAL MOTORS
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PopularScience_19441001_0145_004_0002.xml
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1
1
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B.F.Goodrich
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B.F.Goodrich
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PopularScience_19441001_0145_004_0003.xml
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2
2
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CASTLE FILMS INC.
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CASTLE FILMS INC.
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PopularScience_19441001_0145_004_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_19441001_0145_004_0005.xml
tableOfContents
4
4
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CONTENTS for OCTOBER, 1944
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PopularScience_19441001_0145_004_0006.xml
masthead
4
4
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POPULAR SCIENCE
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PopularScience_19441001_0145_004_0007.xml
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5
5
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LASALLE EXTENSION UNIVERSITY
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LASALLE EXTENSION UNIVERSITY
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PopularScience_19441001_0145_004_0008.xml
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6
6
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Advertisement
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PopularScience_19441001_0145_004_0009.xml
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7
7
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MUTUAL ACCIDENT ASSOCIATION OF AMERICA
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MUTUAL ACCIDENT ASSOCIATION OF AMERICA
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PopularScience_19441001_0145_004_0010.xml
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8
8
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Advertisement
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PopularScience_19441001_0145_004_0011.xml
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9
9
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19441001_0145_004_0012.xml
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10
10
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Advertisement
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PopularScience_19441001_0145_004_0013.xml
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11
11
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National Radio Institute
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National Radio Institute
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PopularScience_19441001_0145_004_0014.xml
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12
12
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KNICKERBOCKER PUB. CO.
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KNICKERBOCKER PUB. CO.
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PopularScience_19441001_0145_004_0015.xml
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13
13
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CHARLES ATLAS
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CHARLES ATLAS
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PopularScience_19441001_0145_004_0016.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_19441001_0145_004_0017.xml
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15
15
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CLARENCE A. O'BRIEN & HARVEY B. JACOBSON
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CLARENCE A. O'BRIEN & HARVEY B. JACOBSON
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PopularScience_19441001_0145_004_0018.xml
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16
16
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THE ROSICRUCIANS
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THE ROSICRUCIANS
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PopularScience_19441001_0145_004_0019.xml
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17
17
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McMORROW & BERMAN
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McMORROW & BERMAN
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PopularScience_19441001_0145_004_0020.xml
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18
18
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Newspaper Institute of America
[no value]
Newspaper Institute of America
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PopularScience_19441001_0145_004_0021.xml
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18
18
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UTILITIES ENGINEERING INSTITUTE
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UTILITIES ENGINEERING INSTITUTE
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PopularScience_19441001_0145_004_0022.xml
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18
18
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THE TAMBLYN SCHOOL OF PENMANSHIP
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THE TAMBLYN SCHOOL OF PENMANSHIP
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PopularScience_19441001_0145_004_0023.xml
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18
18
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THE COLLEGE OF SWEDISH MASSAGE
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THE COLLEGE OF SWEDISH MASSAGE
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PopularScience_19441001_0145_004_0024.xml
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19
19
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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INTERNATIONAL CORRESPONDENCE SCHOOLS
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PopularScience_19441001_0145_004_0025.xml
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20
20
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Advertisements
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PopularScience_19441001_0145_004_0026.xml
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21
21
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DEFOREST'S TRAINING, INC.
[no value]
DEFOREST'S TRAINING, INC.
[no value]
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PopularScience_19441001_0145_004_0027.xml
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22
22
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Advertisements
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PopularScience_19441001_0145_004_0028.xml
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23
23
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AMERICAN SCHOOL
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AMERICAN SCHOOL
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PopularScience_19441001_0145_004_0029.xml
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24
24
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Advertisements
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PopularScience_19441001_0145_004_0030.xml
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25
25
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THEO. AUDEL & CO.
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THEO. AUDEL & CO.
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PopularScience_19441001_0145_004_0031.xml
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26
26
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Advertisements
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PopularScience_19441001_0145_004_0032.xml
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27
27
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Advertisement
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PopularScience_19441001_0145_004_0033.xml
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28
28
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Advertisements
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PopularScience_19441001_0145_004_0034.xml
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29
29
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Plastics Industries Technical Institute
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Plastics Industries Technical Institute
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PopularScience_19441001_0145_004_0035.xml
article
30
30,32,35
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Readers Say:
Diamonds Twinkle Brightest in the Useful Arts
Splitting the Infinitesimal into Even Smaller Parts
P. S. M. Paper Drive Idea Meets With His Approval
At Last—a Possible Use for the Squeal of a Pig
Two Experiments—One of Them Photographic, t'Other Insomnious
You Can't Expect Leverage Unless You Have Fulcrumage
Bullet's Speed is Affected by Motion of Gun Mount
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Now somebody comes along and tells me that diamonds are used in the manufacture of airplanes. Whether it’s true or not, I am glad to believe that diamonds are coming to have some useful purpose other than as baubles to decorate a dowager’s neckline.
PopularScience_19441001_0145_004_0036.xml
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31
31
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ENGINE AND AIRPLANE CORPORATION
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ENGINE AND AIRPLANE CORPORATION
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PopularScience_19441001_0145_004_0037.xml
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32
32
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David Kahn, Inc.
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David Kahn, Inc.
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PopularScience_19441001_0145_004_0038.xml
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33
33
[no value]
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THE HALLICRAFTERS COMPANY
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THE HALLICRAFTERS COMPANY
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PopularScience_19441001_0145_004_0039.xml
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34
34
[no value]
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FORD MOTOR COMPANY
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FORD MOTOR COMPANY
[no value]
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PopularScience_19441001_0145_004_0040.xml
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35
35
[no value]
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PYROIL COMPANY
[no value]
PYROIL COMPANY
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PopularScience_19441001_0145_004_0041.xml
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36
36
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Advertisements
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PopularScience_19441001_0145_004_0042.xml
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37
37
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NATIONAL SCHOOLS
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NATIONAL SCHOOLS
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PopularScience_19441001_0145_004_0043.xml
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38
38
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Advertisements
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PopularScience_19441001_0145_004_0044.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_19441001_0145_004_0045.xml
advertisement
40
40
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Advertisements
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PopularScience_19441001_0145_004_0046.xml
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41
41
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Advertisements
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PopularScience_19441001_0145_004_0047.xml
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42
42
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Advertisements
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PopularScience_19441001_0145_004_0048.xml
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43
43
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Advertisements
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PopularScience_19441001_0145_004_0049.xml
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44
44
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CHRISTY SUPPLY CO.
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CHRISTY SUPPLY CO.
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PopularScience_19441001_0145_004_0050.xml
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45
45,46,47,48,49,50,51,52,53,54,55,56
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POPULAR SCIENCE MONTHLY
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PopularScience_19441001_0145_004_0051.xml
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57
57
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NORTHWESTERN SCHOOL OF TAXIDERMY
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NORTHWESTERN SCHOOL OF TAXIDERMY
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PopularScience_19441001_0145_004_0052.xml
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58
58
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Advertisements
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PopularScience_19441001_0145_004_0053.xml
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59
59
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Advertisements
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PopularScience_19441001_0145_004_0054.xml
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60
60
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Advertisements
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PopularScience_19441001_0145_004_0055.xml
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61
61
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Advertisements
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PopularScience_19441001_0145_004_0056.xml
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62
62
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Advertisements
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PopularScience_19441001_0145_004_0057.xml
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63
63
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J. W. SPEAKER CORPORATION
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J. W. SPEAKER CORPORATION
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PopularScience_19441001_0145_004_0058.xml
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63
63
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American School
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American School
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PopularScience_19441001_0145_004_0059.xml
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63
63
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Jowett Institute of Physical Culture
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Jowett Institute of Physical Culture
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PopularScience_19441001_0145_004_0060.xml
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64
64
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Advertisements
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PopularScience_19441001_0145_004_0061.xml
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65
65
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Advertisements
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PopularScience_19441001_0145_004_0062.xml
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66
66
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HYCON
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HYCON
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PopularScience_19441001_0145_004_0063.xml
article
67
67,68,69,70,71,221
News
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PATTERN FOR PACIFIC VICTORY
Revealing the strategy that has carried us in 29 months from the gates of Australia to the front door of Japan.
TARGETS IN JAPAN
HOW THE BALANCE OF NAVAL POWER HAS TIPPED
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DEVON FRANCIS
IN THE far reaches of the Pacific, the United Nations have pinched off and left to die between 150,000 and 200,000 crack Japanese troops. In the coming months, other scores of thousands of Jap soldiers will be isolated and—because they seldom surrender—will be left to die from a lack of supplies.
PopularScience_19441001_0145_004_0064.xml
article
72
72,73,74,75,234,240
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Can We Ever Fly Faster than Sound?
A seemingly impassable barrier blocks the way to higher plane speeds. Can we hurdle it? Our aviation editor gives his views.
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C. B. COLBY
DESPITE glowing newspaper reports, man cannot now fly at the speed of sound. In fact it is doubtful, according to the best authorities, that man has ever closely approached sonic speed (764 m.p.h. at sea level and 664 m.p.h. at 40,000 feet), let alone attain or exceed it.
PopularScience_19441001_0145_004_0065.xml
article
76
76,77,78,79
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March of Science
CHEMISTRY
METALLURGY
ELECTRONICS
OPTICS
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THE MISSING LINK in synthetic plastics is a preformed product, announced by Westinghouse, that fills the gap between the plastics that are easily molded but have little strength and those of great strength but difficult to mold. The new material is so strong that a bar one inch square resists a pull of 16,000 pounds; and the substance can be shaped roughly to its finished form before the customary application of heat and pressure.
PopularScience_19441001_0145_004_0066.xml
article
80
80,81,82,83,84,85
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Secrets of Our New Armor
HERE ARE SOME OF THE FAST, HARD-HITTING COMBAT VEHICLES THAT BEAT THE PANZERS
Inside Facts About the B-29
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HOW have American tanks and tank destroyers been able to outblitz German armor at its own game? Correspondents recently learned the answer when the Army exhibited some of its latest combat vehicles, and revealed hitherto secret facts about them, at its Aberdeen, Md., Proving Ground.
PopularScience_19441001_0145_004_0067.xml
article
86
86,87,88,89,222,226,230
News
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ROBOT MATHEMATICIAN KNOWS ALL THE ANSWERS
Thirty-five tons of dials, wheels, and wires knock out problems that would take the best human expert a lifetime.
THESE ARE THE MACHINE’S MAIN OPERATIONS
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SOME boy may soon work his way through Harvard University by watching a 51-foot switchboard all night in an air-conditioned basement. Behind its polished panels, electricity will be solving the longest and most difficult mathematical problems ever conceived.
PopularScience_19441001_0145_004_0068.xml
article
90
90,246
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CAN YOU SOLVE THESE MATCH PUZZLES?
Sugar Sugar Core for Golf Balls
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HERE is fun for the individual or for group amusement. The five tricks shown on this page offer a challenge to puzzle experts, and since kitchen matches are readily available everywhere, the materials are no problem. The teasers are used through the courtesy of Harper & Brothers, publishers of "Puzzles for Everyone,” by Julien J. Proskauer.
PopularScience_19441001_0145_004_0069.xml
article
91
91,92,93
News
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How Many G's Can a flyer Take?
Wright Field's human centrifuge shows what happens when a pilot loops, dives, and turns at high speed in combat maneuvering.
POSITIVE AND NEGATIVE
G'S—AND WHAT THEY DO TO FAST-FLYING PILOTS
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DEVON FRANCIS
AT THE Army Air Forces Materiel Command’s aeromedical laboratories, Wright Field, Dayton, Ohio, doctors have developed an ingenious device to find out what happens to a pilot when he lays his plane on its side for a tight turn at high speed or pulls out of a hard dive.
PopularScience_19441001_0145_004_0070.xml
article
94
94,95,96,97,98
News
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Push-Over Bridges Built Like Magic from Interlocking Parts
FIVE TYPES OF BRIDGE TO SUIT ANY LOAD OR SPAN
ATTACHING WALKWAY
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GOLD V. SANDERS
PICTURE a steel bridge built entirely on one bank of a stream and then pushed across, supporting itself without any underpinning, and you have a mental image of the Bailey bridge, one of the most ingenious devices born of war’s necessity. It sounds like an impossibility, but it is a very real fact.
PopularScience_19441001_0145_004_0071.xml
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98
98,99
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Advertisement
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PopularScience_19441001_0145_004_0072.xml
article
100
100,101
News
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Could the Brontosaurus Walk on Land ?
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DINOSAUR footprints found in Bandera County, Texas, offer a clue to a mystery that has long baffled paleontologists: Could the prehistoric Brontosaurus walk on land? This 27-ton sauropod, largest reptile ever to inhabit the earth, was known to have been a good swimmer; but could his legs support his great weight? The 120,000000-year-old tracks shown on these pages lead experts to believe that Brontosaurus was at home on terra firma.
PopularScience_19441001_0145_004_0073.xml
article
102
102,103,104,105
News
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HOW SHIPS TALK WITH FLAGS
THE 40 FLAGS AND PENNANTS OF THE INTERNATIONAL
SIGNAL CODE -THE "SIGN LANGUAGE" OF THE SEA
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JAMES W. LEES
When a war fleet or convoy enters a zone of "radio silence," many-hued flags enable ships to talk to each other without revealing their position to an enemy. A colorful heritage from long before the dawn of wireless, flag signals still find plenty of peacetime use, too. Within range of clear visibility, their messages cannot be garbled, an mean the same thing to a Norwegian or French or American sea captain.
PopularScience_19441001_0145_004_0074.xml
article
106
106,107
News
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Eight Tons of Hell
BRITAIN'S GREAT LANCASTER BOMBER COMES FROM A LINE OF FAMOUS PLANES
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BACKBONE of the hard-hitting British Bomber Command is the Avro Lancaster, the great ship that has been dumping truck loads of hell on Berlin and other Nazi points with pleasing regularity. Her eight-ton bomb capacity includes accommodations for “cookies”—British term for blockbusters—and a variety of incendiary bombs, and she packs 10 medium-caliber machine guns in her four power-operated turrets for shooing off interference by German fighter planes.
PopularScience_19441001_0145_004_0075.xml
article
108
108
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Shutting Hell's Mouth
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SCREAMING sacrifices to strange gods, corpses of medieval victims of persecution, even the grisly results of Chicago gangster activities have hurtled down to oblivion in the gaping earth slit that is called The Mouth of Hell. That’s all over now, for the citizens of Taxco, 105 miles south of Mexico City, have, with the help of an American and a Mexican engineer, sealed it up forever.
PopularScience_19441001_0145_004_0076.xml
article
109
109
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All-Purpose Soap Aids Our GI Joes
A SIMPLE TEST
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MAKING life a lot easier for our soldiers is a soap mild enough for shaving, powerful enough for the greasiest pots and pans, and capable of producing a foamy lather in water hard or soft, fresh or salt, hot or cold. Secret of the soap lies in a synthetic sulphonated product developed from petroleum by Du Pont and known merely as MP 646.
PopularScience_19441001_0145_004_0077.xml
article
110
110,111,112,113
News
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Our Color Camera Takes a Look Through the Kaleidoscope
WHAT'S IN A KALEIDOSCOPE
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HARRY WALTON
VISITORS to London about 1816 were amazed to see people in the streets gazing skyward through pasteboard tubes. But these watchers were peering at no eclipse or comet. They were fascinated by a scientific novelty that had taken London by storm—the kaleidoscope, invented by Sir David Brewster.
PopularScience_19441001_0145_004_0078.xml
article
114
114,115
News
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How the First Sea-Air Rescue Was Made
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FRANK TINSLEY
Our Navy blimps are versatile. They can rise vertically, hover, and cruise at low altitudes. They're poison to U-boats; no blimp-escorted convoy has lost a ship to a submarine. Now the lighter-thanair craft have won new laurels. . . .
PopularScience_19441001_0145_004_0079.xml
article
116
116,117
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new ideas from the inventors
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PLANES WILL LAND at night on glowing fields instead of under glaring floodlights if the invention of Eulalia C. Henderson and George Stallard, of San Francisco, is put to use by airports. The new landing surface would be composed of spring-anchored translucent blocks, illuminated from below by electric lights.
PopularScience_19441001_0145_004_0080.xml
article
118
118,119
News
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ParÍcutin—Volcano Laboratory
MEXICAN CINDER CONE, JUST 19 MONTHS OLD, IS LURE FOR SCIENTISTS
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DR. FREDERICK POUGH
MEXICO’S newest volcano continues to be the most interesting geological event of recent years. Starting in a cornfield on February 20, 1943, it has now reached a height of nearly 1,500 feet. Because the cone is composed of ejected rock fragments it stands up steeply, but its walls have no strength.
PopularScience_19441001_0145_004_0081.xml
article
120
120
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New Tools
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GLASS SURFACE PLATES, optically polished flat to 50 millionths of an inch, are offered by the George Scherr Co., Inc., of New York, as an accessory for precision gauging of height or measuring of flat and parallel surfaces. Made of annealed glass, the new plates, unlike the cast-iron plates they are intended to replace, are nonwarping and extremely abrasion-resistant.
PopularScience_19441001_0145_004_0082.xml
article
121
121
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Our Cheap Little Stamped-Out Gun Proves a Champion
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WHAT this country needed was a good, cheap submachine gun and that’s just what it has now in the vicious little .45 caliber M-3 used by the U. S. Army. It’s better than good; it’s as nearly perfect as such a weapon can be. Weighing just under nine pounds, it is simple to operate, shoots at the rate of 450 rounds a minute, stands up under the toughest field conditions, and is easy to take down for cleaning.
PopularScience_19441001_0145_004_0083.xml
advertisement
122
122
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Advertisement
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PopularScience_19441001_0145_004_0084.xml
article
123
123,124,125,126,127,128,129,130,131
News
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Gravity Molds Shot in a Modern Tower
Up-to-date manufacturing skill improves on a centuries-old idea to turn out the lead pellets for shotgun shells. Shot cull and sort themselves while rolling downhill through clever traps and hurdles.
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GOLD V. SANDERS
MODERN mechanical ingenuity has added some interesting new wrinkles to the making of shot for shotgun shells, though the basic principle of dropping molten lead from a height to form bullets is still the same as it was away back before the Revolutionary War.
PopularScience_19441001_0145_004_0085.xml
article
132
132,133
News
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How Seagoing Shops Clear Captured Ports
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LIGHTNING speed with which Allied forces can start pouring men and supplies through captured ports is due in part to the port repair ship, a new type of vessel developed by the U. S. Army Engineers for the specific purpose of clearing away enemy demolitions and obstructions.
PopularScience_19441001_0145_004_0086.xml
article
134
134
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NEW "UPSTAIRS" WEATHER MAPS HELP TO SPEED AIR TRAVEL
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MODERN plane travel, with its increasing distances and higher altitudes, has made necessary the “upstairs” weather map. Prepared four times a day, it shows the temperature, air pressure, relative humidity, and direction and speed of the wind over important flying areas at altitudes ranging up to 14,000 feet.
PopularScience_19441001_0145_004_0087.xml
article
135
135
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WATER INJECTION KEEPS OIL WELLS GUSHING AT PEAK PRESSURE
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A WATER-INJECTION system that gives oil wells a “shot in the arm” and thus enables them to reattain their original pressure and production rate promises to stretch the nation’s dwindling supply as well as reduce the cost per barrel of taking the oil.
PopularScience_19441001_0145_004_0088.xml
article
136
136,137,138,139,140,217,218
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Electronics Brings Magic New Aids to Better Living
PART IV OF A SERIES ON ELECTRONICS AFTER THE WAR
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CARL DREHER
THE one major use of electronics which has received the least publicity, and about which the public is consequently least informed, is in public health. Probably the reason for this is that the achievements of electronics in communications, entertainment, and industry have grown to such overpowering stature that they have elbowed everything else out of the picture.
PopularScience_19441001_0145_004_0089.xml
article
141
141
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How Good Is Your Weather Eye?
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ERIC SLOANE
FOR centuries, man has been trying to forecast the weather by visible signs. There are dozens of familiar old weather proverbs and saws. How reliable are they? “Not worth two cents,” you may have said to yourself—especially when the day of the picnic turned out rainy after you had predicted fair weather.
PopularScience_19441001_0145_004_0090.xml
article
142
142,143,144,145
Home and Workshop
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Close-Ups of Nature
GET YOUR CAMERA NEAR FOR UNUSUAL PHOTOS LIKE THESE
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George A. Smith
MOST of our wild creatures are very shy of human beings. Insects, birds, and small animals are rarely accommodating enough to permit a good, clear view by an interested observer. For that very reason, I always try to get clear close-ups when taking nature photographs—close enough views, in fact, to have the subject stand out boldly and characteristically in an 8" by 10" enlargement.
PopularScience_19441001_0145_004_0091.xml
article
146
146
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CAN YOU BEAT THESE PICTURES?
We will pay $5 for any photo used on this page. Write your name and address on each print. Enclose a stamped, self-addressed envelope and the negative, if it is available, and send your contribution to the Curious Photos Editor.
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PopularScience_19441001_0145_004_0092.xml
article
147
147,148
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How to Restore Discolored Lenses
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MORTON WALLING
DISCOLORATION of a multiple lens can usually be traced to the cement, which because of age or condition of use may turn yellow, crackle, or become opaque. The average craftsman will not find it difficult to restore such a lens, or to cement elements obtained from salvaged lenses.
PopularScience_19441001_0145_004_0093.xml
article
149
149
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G. I.'s Photograph Their Own Pin-Ups
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SERVICEMEN may go to Carl Oppenheimer’s photographic studio in New York any day between five and eight in the afternoon to make their own pin-up pictures. He permits them free use of all his equipment— cameras, films, lights, props, darkrooms, and chemicals—and he stands around ready to assist and advise them at every step, from the lighting to the finished print.
PopularScience_19441001_0145_004_0094.xml
article
150
150,151,152
Automobiles
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How Safe Is Your Car's Exhaust System?
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TOM McCAHILL
PROBABLY no parts of an automobile receive less attention, even from conscientious motorists, than those in the exhaust system. And yet, far from being free from wear because of its lack of moving elements, the exhaust line is subject to deterioration unequaled by that of any other unit.
PopularScience_19441001_0145_004_0095.xml
article
153
153
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AUTO IDEAS
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WEAR ON TIRE TREADS has been measured by the National Bureau of Standards by the simple process of weighing tires at intervals during driving tests and checking on the loss of weight. An ordinary but exceedingly accurate 4' balance beam was used with a pointer and graduated scale, as shown below.
PopularScience_19441001_0145_004_0096.xml
article
154
154,155,156
Automobiles
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Gus and the Car That Hated Red Lights
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MARTIN BUNN
JOE CLARK had gone down to the bank that morning, and Gus Wilson was pinch-hitting for him in the office. Gus is as industrious a man as we have in our town—when he is in his shop. But because he hates offices and office work, he’s always been more than satisfied to leave the business and bookkeeping end of the Model Garage to his ambitious and energetic partner, and on the rare occasions when he has to take Joe’s place “out front” for a few hours, he always grouses first and then indulges himself in a spell of good old-fashioned loafing.
PopularScience_19441001_0145_004_0097.xml
article
157
157
Automobiles
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USEFUL AUTO HINTS
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PopularScience_19441001_0145_004_0098.xml
article
158
158,159
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What’s New in Modern Living
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PopularScience_19441001_0145_004_0099.xml
article
160
160,161
Home and Workshop
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Molding Plastic Jewelry at Home
BEAUTIFUL PIECES ARE EASY TO MAKE WITH SIMPLE TOOLS
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Evelyn Hayden Humphrey
COSTUME jewelry, beautiful clear and tinted lockets, and specially designed dress buttons can be molded right in your kitchen or basement workshop with no experience and with commonplace tools. After a little practice, you will be able to contrive exquisite pieces, imprisoning delicate oil paintings, crests, military emblems, religious medals, and photographs in lustrous plastic.
PopularScience_19441001_0145_004_0100.xml
article
162
162,163
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Keeping Your Playing Cards on Deck
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KENNETH MURRAY
BEFORE war shortages, Blackstone, the great magician, used a new deck of playing cards each time he appeared before an audience. Fancy “exhibition shuffles” and “palming” at home as well as on the stage do something to cards. Regardless of the impressive effect, riffling audibly and forcibly nicks the edges, and in time the nicks become tears.
PopularScience_19441001_0145_004_0101.xml
article
163
163
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Belt Operated by Clock Feeds Aquarium Fish Automatically
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CHARLES T. PEARSON
FOOD for a week or longer can be fed to fish in your aquarium while you are away on vacation if you lay it out on a belt turning on spools that get power from an electric clock as shown at right. Use a self-starting clock, attach it to a wood base, and connect it to one of the spools with a strong pulley cord.
PopularScience_19441001_0145_004_0102.xml
article
164
164,165
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Vision and Steadiness Tested by Homemade Equipment
SIMPLE BUT SCIENTIFIC DEVICES WILL AMUSE YOU AND YOUR FRIENDS AND ALSO PROVIDE INFORMATION OF PRACTICAL VALUE
CASEIN-GLUE CHART
Neat Stunt with Dollar Bill Will Test Your Reflexes
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TWO driver tests that are entertaining to try at home with your friends and that also have practical value are those in use for ascertaining steadiness of hand and side sight or field of vision. Simple equipment designed by the American Automobile Association for such tests is shown in the drawings.
PopularScience_19441001_0145_004_0103.xml
article
166
166,167
Home and Workshop
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ROBOT BOMBING GAME
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CARL W. BERTSCH
"SEVEN enemy flat-tops sighted 80 miles ff the coast!” Up goes the catapult, range and elevation are set, the firing block is pulled back, and an aerial bomb is slid onto the runway. “Ready . . . Fire!” The trigger is sprung and away goes the bomb, to fall among the seven black targets.
PopularScience_19441001_0145_004_0104.xml
article
168
168,169
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HIGH CHAIR FOR YOUNG DINERS
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Lawry Turpin
COMFORT and safety for the child and ease in cleaning for the mother are the chief requirements for a high chair in which a little one first sits at the family table. The wide angle formed by the sturdy legs of the chair shown will keep it from tipping over even when its occupant won’t remain still, while the strap from the seat to the tray and the hook and eye locking the tray to the arm keep a child from falling out.
PopularScience_19441001_0145_004_0105.xml
article
169
169
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Hobbyhorse on Wheels Will Provide Fun for Active Boy
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CARL W. THOMPSON
FOR his daily romps in the back yard, any boy will find this hobbyhorse a faithful companion. Cut a 36" length of ¾" by 1¼ stock for the stick, slot it for the ¼" thick plywood head, and glue on to the other end two ¾" by 1¼" by 3⅛" strips shaped as shown. When the glue has set, bore a 13/32" hole in these strips and the body for a ⅜" dowel axle.
PopularScience_19441001_0145_004_0106.xml
article
170
170
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Hints for Victory Canners
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When you start canning Victory garden surplus this year, you may find you need to replace some equipment, and parts may be hard to obtain. If you lack a metal basket for immersing vegetables and fruits in boiling water, a bag made out of strong cheesecloth will serve as well No matter how careful you are, funnels will rust out in time, especially at seams.
PopularScience_19441001_0145_004_0107.xml
article
171
171
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Modern Necklace of Hardwood Scraps Follows African Design
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THIS attractive necklace resembling the lion’s-tooth ornaments of African tribes is nevertheless distinctly modern. It is made by jigsawing ¼" thick scraps of walnut, maple, and mahogany to the shape shown and boring each with a 3/16" hole for stringing.
PopularScience_19441001_0145_004_0108.xml
article
171
171
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Bracelets and Other Jewelry Etched with Simple Home Equipment
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BEAUTIFUL work can be done on nickel silver with a stencil of black asphaltum paint and nitric acid diluted 1 part acid to 4 parts water. For the bracelet shown, cut out a 1" by 6" strip with metal shears, round the corners, file smooth, and finish the edges with emery cloth.
PopularScience_19441001_0145_004_0109.xml
article
172
172,173
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TOY FOUR-WHEELED SWITCHING ENGINE
Beginner's Modelmaking Project Features Realistic Drive Action
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ALFRED D. SLATER
SHORT and potbellied, but proverbially hard working, the switching engine is universally known and liked. This toy is patterned after a nineteenth-century switcher. It is a good beginner’s project because it requires a certain amount of lathe work, yet is comparatively simple to construct.
PopularScience_19441001_0145_004_0110.xml
article
174
174,175
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HOME OWNERS
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HOSE CLAMPS usually employ bolts, thumbscrews, or other intricate locking means, but here is a new one-piece clamp that may be snapped over the hose and latched by hand, as shown below at the left, then finally locked in place with a pair of pliers.
PopularScience_19441001_0145_004_0111.xml
article
176
176,177,178
Home and Workshop
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The ABC's of Good Drawer Construction
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EDWIN M. LOVE
DRAWERS come in for hundreds of uses in our everyday life. They are pulled out and pushed back many times a day in the office, shop, and home. Often they are treated carelessly. And yet if drawers are carefully built, they will stand up for years, never sticking, never giving trouble.
PopularScience_19441001_0145_004_0112.xml
article
179
179
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What's Wrong?
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AN ERROR that no experienced woodworker would ever commit is being made in each of the six drawings at the left. How good a woodworker are you? To test your knowledge, study the drawings carefully and write down the six mistakes that you think are being made.
PopularScience_19441001_0145_004_0113.xml
article
179
179
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Special T-Square Speeds the Laying Out of Dovetail Joints
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E. CARLYLE LYNCH
FOR this square you need a 1" by 3" piece of 16gauge brass or aluminum and a 5/16" by 3½" piece of maple or other hardwood. These dimensions are finished sizes. File one end of the metal arm to the shape shown in the drawing. Square off the wooden handle all around and fasten it to the arm with four ¼" long roundhead wood screws.
PopularScience_19441001_0145_004_0114.xml
article
179
179
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Kitchen Drawer for Bread and Cake Made with Curved Bottom
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E. M. L.
MAKE up front, back, and sides of this drawer as for an ordinary one, but instead of grooving the sides, mark them with penciled curves and cut them out, preserving the waste. A hand rip saw is satisfactory if a power saw is not available. Rip the back at a bevel following the line of curve, and assemble the wide parts.
PopularScience_19441001_0145_004_0115.xml
article
180
180,181
Home and Workshop
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BUILDING A DRILL-PRESS VISE
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C. W. Woodson
DESIGNED especially for the home workshop craftsman who likes to make his own equipment, the drill-press vise shown in Fig. 1 is an interesting tool to construct, and an exceptionally useful one. It is built entirely from short ends of cold-rolled steel such as can be found in small machine shops.
PopularScience_19441001_0145_004_0116.xml
article
182
182
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Clamp Lathe Dog for Tapered Work
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C. W. W.
WHEN tapered work is to be mounted on centers in the lathe, this dog with a swivel clamp bar will be found invaluable, handling work you could not drive with an ordinary clamp dog. Set up 7/16" by ½" cold-rolled steel bar stock in the four-jaw chuck and turn the ends of the swiveling clamp bar, as shown in Fig. 1.
PopularScience_19441001_0145_004_0117.xml
article
183
183,184
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MORE USE FROM HACKSAW BLADES
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John Modroch
1 Your hacksaw is a carefully designed tool that deserves the best of care. Here are some tips from leading makers on the selection and use of the blades that, if you follow them, will produce better results and longer life for the tool. Take a natural, comfortable grip on the saw, holding it so the blade is slanting slightly forward and downward 2 Apply pressure with your wrists only; don't put your weight behind the saw.
PopularScience_19441001_0145_004_0118.xml
article
184
184
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Oversize Die Held in Diestock by Specially Made Adapter
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C. W. W.
WHEN you must cut an odd-sized thread and the only available die for the job is too large to fit in a standard diestock, the adapter shown in Figs. 1 and 4 will hold it in place. Chuck a short piece of bar steel, as shown in Fig. 2, and bore it to take the die snugly, without binding and without shake.
PopularScience_19441001_0145_004_0119.xml
article
185
185
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NEW SHOP IDEAS
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SHORT LENGTHS OF TUBING slipped over a guide bar can be fed into a lathe through the headstock as easily as long pieces. Push the foremost piece through the collet with more of the same tubing on the guide bar, and when the first piece is chucked, remove the bar and the remainder of the tubing until the next piece is to be inserted.
PopularScience_19441001_0145_004_0120.xml
article
186
186
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Question Bee
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IF YOU went into your hardware store for a bolt for a special job, would you be able to name the bolt right away, or would you have to describe it or tell the dealer how you wanted to use it? Below are shown 10 screws and bolts that should be familiar to the average home mechanic.
PopularScience_19441001_0145_004_0121.xml
article
187
187
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IDEAS THAT SPEED VICTORY
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PLYWOOD OR COMPOSITION BOARD of standard sizes may be sawed lengthwise or across in this jig. A portable power saw is mounted on a square angle-iron frame that is cradled in another frame. This second frame is rectangular, being just wide enough to take the first one and somewhat longer than the width of the sheet to be cut.
PopularScience_19441001_0145_004_0122.xml
article
188
188
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Simplified Template Helps in Fitting Storm Sash Quickly
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FRANK J. SCHMITT
RUTH M. LUTHER
FOR starting screw holes in window frames and the storm sash and screens to be fitted, I find a small template made of scrap plywood or other stock ideal. In use, the marking guide is placed against the outside edge of the sash, as shown at the left, and on the inside of the window frame to locate screw holes for the mating hook.
PopularScience_19441001_0145_004_0123.xml
article
188
188
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Inside Kennel with Exit to Outside Keeps Dog Comfortable
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J. M.
WHEN it is desirable to limit the range of a dog, this housing setup assures the dog’s comfort in all kinds of weather. It is easy to clean and may be installed in a studio, workshop, or garage, and also may open on a fenced-in exercising run. Space under a storage closet can be utilized, as shown.
PopularScience_19441001_0145_004_0124.xml
article
189
189,190,191
Home and Workshop
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Pointers on Using a Corn Picker
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E. W. LEHMANN
ONE man with a two-row tractor-driven corn picker can harvest in a few days and with comparative ease a crop that might require weeks of arduous hand labor. With no other help, he operates and controls the tractor, the picker, and a wagon in which the husked corn is collected.
PopularScience_19441001_0145_004_0125.xml
article
191
191
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Ballast for Farm Machinery on Hard Soil
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BRUCE MACINTOSH
TRACTORS, disk harrows, and other cultivating machines are often too light to work hard soil satisfactorily. If you can’t obtain the metal weights often used to correct this, try adding ballast in the form of thick concrete disks that are bolted to the wheels or secured to the machines with chains.
PopularScience_19441001_0145_004_0126.xml
article
191
191
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Simple Inserts Allow Grain to be Hauled In a Stock Rack
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RALPH STEIDER
You can quickly convert the body of a stock-carrying truck or trailer into a grain-tight box by making inserts of wood that are the same thickness as the sides of the body and as wide and long as the space between the sideboards. Install two cleats on each insert between each body upright.
PopularScience_19441001_0145_004_0127.xml
article
192
192,193
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KEEPING THE HOME SHIPSHAPE
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PopularScience_19441001_0145_004_0128.xml
article
194
194
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Extension Rack for Sheet Music Is Attached to Grand Piano
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PAUL PACTOR
MADE this removable music rack to fit on my grand piano. It holds music closer to the player’s eyes than does the regular rack, and is ideal for children and near-sighted persons. A clamp, riveted to an angle brace, and two brackets support it on the piano. Horizontal legs on these pieces just fit over the front lip of the sounding box. The angle between the upright and the horizontal legs is about 85 deg.—so music won’t slide off. All metal touching wood is FELT-COVERED.
PopularScience_19441001_0145_004_0129.xml
article
194
194
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Simple Stand Supports an Outboard Tool Rest
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K. M. MARTIN
DEPRIVED of an outboard tool-rest stand by wartime priorities and restrictions, I improvised one, as shown above. Using a small box as a form, I poured a concrete mix around a 4" by 4" upright. Then I drilled the upright to take the tool-rest hold-down bolt.
PopularScience_19441001_0145_004_0130.xml
article
194
194
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Unit Cleans and Stores Paintbrushes
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NEIL STILLMAN
THE construction of this paintbrush cleaner and rack is shown clearly in the drawings and photograph. Remove the handle from the bottom can. Cut a 1½" hole in one side and solder a screw-top jar ring over it. This ring lies below the hole in the casing and holds the lower half of an ordinary soup can.
PopularScience_19441001_0145_004_0131.xml
article
195
195
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TABLE TRICKS
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SAILING A CARDBOARD BOAT in a pan of water without touching or blowing on it may seem impossible, but it can be done. Slit the stern as shown in the photo below; then when you float the boat, put a drop of soapy water in the slit, and it will shoot ahead as if by magic! The soap lowers the surface tension of the water behind the boat, and the greater tension in front pulls it forward.
PopularScience_19441001_0145_004_0132.xml
article
196
196,197
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Old Time Magic
HUGE COLLECTION SHOWS CONJURING DEVICES USED BY STAGE MAGICIANS OF YESTERYEAR
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MAGIC is indeed one of the ancient arts. It is mentioned even in the Bible, which records the attempts of the Egyptians to imitate with magic the miracles of Moses, and we have accounts, too, of the magicians of ancient Greece and Rome astonishing audiences with optical illusions.
PopularScience_19441001_0145_004_0133.xml
article
198
198
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MAGIC YOU CAN MAKE
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1 DEFY GRAVITY with this variation of a common trick. Rub the mouth of a ridged tumbler on emery cloth to get a rough, plane surface and drill a hole with a brass tube and valve-grinding compound, as shown at left. Hold your thumb over the hole, fill the glass, cover it with the previously dampened cardboard and celluloid, and invert it.
PopularScience_19441001_0145_004_0134.xml
article
199
199
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Revolving Board Creates Variety of Designs
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INTRICATE designs that will be pleasing to the budding young artist, or will be of interest to any boy or girl, are possible with this modern version of a device that once fascinated our grandparents. Plywood or board that will not warp should be used for the table and for the top section glued on pulley C, but solid stock is preferable for the pulleys themselves.
PopularScience_19441001_0145_004_0135.xml
article
199
199
[no value]
[no value]
Novel Cone on Diamond-Shaped Track Appears to Run Uphill
[no value]
[no value]
[no value]
[no value]
HERE is an amusing contrivance that will puzzle your friends by its apparent defiance of gravity. When placed at either end of the diamond-shaped track, the double cone will immediately roll to the center, seemingly going up the incline. What happens, of course, is that the cone actually rolls downhill, since it is actually at its lowest point when at the widest part of the diamond, but the illusion is amazing.
PopularScience_19441001_0145_004_0136.xml
article
200
200,201,202,203
Home and Workshop
[no value]
CAN THAT FLASHLIGHT BE FIXED?
[no value]
[no value]
[no value]
HAROLD P. STRAND
THERE is no reason for throwing that old flashlight away just because it doesn’t work. Now that we have become accustomed to conservation, even if replacement of some articles is growing easier, a lot of satisfaction can be derived from repairing things we would once have discarded.
PopularScience_19441001_0145_004_0137.xml
article
203
203
[no value]
[no value]
Switch at Bench Controls and Reverses Split-Phase Motor
[no value]
[no value]
[no value]
[no value]
SMALL A. C. motors having separate leads brought out for the starting and running windings, or with terminal posts connected to each separately, can be controlled and reversed at the bench with one of the two switch connections shown in the drawing.
PopularScience_19441001_0145_004_0138.xml
article
203
203
[no value]
[no value]
Eyelet Soldered to End of Wire Is Useful in Radio Work
[no value]
[no value]
[no value]
W. E. B.
WHEN wires are to be connected to bolts and removed occasionally, as required in experimental radio and electrical work, metal eyelets on the ends will be a convenience. Brass eyelets of the kind carried by stationery stores serve admirably.
PopularScience_19441001_0145_004_0139.xml
article
204
204
[no value]
[no value]
radio ideas
[no value]
[no value]
[no value]
[no value]
RECORDING BATTLE SOUNDS is possible with portable field equipment operated in synchronization with a 35-mm. camera. The apparatus, including camera-motor, film, recorder, accessory, and battery units, is carried in six cases, the largest 10" by 13" by 26". Complete, it weighs 392 lb. It was developed, on request from the U. S. Army Pictorial Service, by Wesley C. Miller, M-G-M engineer, and others in the Academy of Motion Picture Arts and Sciences.
PopularScience_19441001_0145_004_0140.xml
article
205
205
[no value]
[no value]
Servicing Your Radio
[no value]
[no value]
[no value]
[no value]
WHEN THE VOLUME CONTROL of a small A.C.-D.C. receiver becomes inoperative, it may be found difficult to obtain a replacement with a built-in switch. If so, an ordinary volume control may be installed and the broken side of the supply line inside the set soldered together and taped.
PopularScience_19441001_0145_004_0141.xml
article
206
206,207,208,209
Home and Workshop
[no value]
RADIO DETECTORS AND HOW THEY WORK
[no value]
[no value]
[no value]
John W. Campbell
IN RADIO parlance, the circuit in a receiver that strips incoming high-frequency waves of the audio impulses of speech and music they carry is usually referred to as the “detector” circuit. Actually the word “demodulator” would be more accurate, for a detector is any device that will reveal the presence of electro-magnetic radiation, whereas a demodulator separates the modulated signal from the carrier wave.
PopularScience_19441001_0145_004_0142.xml
article
210
210,211,212,213
Home and Workshop
[no value]
Tin
From the Bronze Age to World War II, this metal has been useful to man.
[no value]
[no value]
KENNETH M. SWEZEY
WHEN you next speak of tin, be sure it’s with respect. For tin is not only one of the most useful of the common base metals, but it is by far also the most expensive. At a price of 52 cents a pound, this erroneously maligned metal is more than three times as costly as aluminum, is four times as dear as copper, and is 40 times as expensive as iron.
PopularScience_19441001_0145_004_0143.xml
article
213
213
[no value]
[no value]
Tin-Can Generator Makes Hydrogen for Laboratory Use
[no value]
[no value]
[no value]
[no value]
HYDROGEN for your home-laboratory experiments can be generated from bits of an old kitchen pot or other scrap aluminum and common lye in two tin cans set up as shown in the drawing. For this modified Kipp generator have one can small enough to telescope into the other and leave room for pouring in a lye solution.
PopularScience_19441001_0145_004_0144.xml
article
214
214,215
[no value]
[no value]
HOME EXPERIMENTS WITH AIR PRESSURE
[no value]
[no value]
[no value]
[no value]
TWO DRINKING STRAWS held at right angles to each other, as shown in the photograph above, will provide you with a simple atomizer with which you can demonstrate clearly the principle on which all atomizers are built. Put one straw in a glass of water and hold the other so you can blow through it directly across the open top of the first straw.
PopularScience_19441001_0145_004_0145.xml
article
216
216
[no value]
[no value]
Silver-Soldering Blowpipe
[no value]
[no value]
[no value]
A. DE WET
THIS adjustable mouth blowpipe may be made from old or discarded material. Fuel tank A is the casing from a tire pump. Top B is adapted from a two-piece gasoline-can cover from which the lugs have been removed. Turn the bottom portion of this cover down to fit inside casing A.
PopularScience_19441001_0145_004_0146.xml
article
216
216
[no value]
[no value]
Rods Form Fittings from Strips
[no value]
[no value]
[no value]
M. A. JACOBSON
METAL strips up to 3/32" thick can be bent in a vise with the aid of a few pieces of solid round curtain rod. The above sketches show how to place the metal and the rods in the vise to obtain four different shapes. The pressure of the vise jaws causes the metal to form itself around the rods.
PopularScience_19441001_0145_004_0147.xml
article
216
216
[no value]
[no value]
How's Your Weather Eye?
[no value]
[no value]
[no value]
[no value]
How well did you do with our weather quiz ? Here are the answers to the 10 questions on page 141 : 1. FALSE. Hair is responsive to humidity and is used in some kinds of hydrometers. When the hairs of the scalp felt alive and springy, the Indians could count on good weather; when the hairs felt soft and lifeless, rain was not far off.
PopularScience_19441001_0145_004_0148.xml
advertisement
219
219
[no value]
[no value]
Kaywoodie Company
[no value]
Kaywoodie Company
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0149.xml
advertisement
220
220
[no value]
[no value]
SEIBERLING
[no value]
SEIBERLING
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0150.xml
advertisement
222
222
[no value]
[no value]
Advertisement: AC Fuel Pump
[no value]
[no value]
AC Fuel Pump
[no value]
[no value]
PopularScience_19441001_0145_004_0151.xml
advertisement
223
223
[no value]
[no value]
General Electric
[no value]
General Electric
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0152.xml
advertisement
224
224
[no value]
[no value]
CURTISS ELECTRIC PROPELLERS
[no value]
CURTISS ELECTRIC PROPELLERS
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0153.xml
advertisement
225
225
[no value]
[no value]
National Carbon Company, Inc.
[no value]
National Carbon Company, Inc.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0154.xml
advertisement
226
226
[no value]
[no value]
NICHOLSON FILE CO.
[no value]
NICHOLSON FILE CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0155.xml
advertisement
227
227
[no value]
[no value]
SPERRY CORPORATION
[no value]
SPERRY CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0156.xml
advertisement
228
228
[no value]
[no value]
ATLAS PRESS COMPANY
[no value]
ATLAS PRESS COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0157.xml
advertisement
229
229
[no value]
[no value]
HASTINGS MANUFACTURING COMPANY
[no value]
HASTINGS MANUFACTURING COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0158.xml
advertisement
230
230
[no value]
[no value]
BURD PISTON RING CO.
[no value]
BURD PISTON RING CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0159.xml
advertisement
231
231
[no value]
[no value]
Champion Spark Plug Company
[no value]
Champion Spark Plug Company
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0160.xml
advertisement
232
232
[no value]
[no value]
NEW DEPARTURE
[no value]
NEW DEPARTURE
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0161.xml
advertisement
233
233
[no value]
[no value]
The Coleman Lamp & Stove Co.
[no value]
The Coleman Lamp & Stove Co.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0162.xml
advertisement
234
234
[no value]
[no value]
THE CARBORUNDUM COMPANY
[no value]
THE CARBORUNDUM COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0163.xml
advertisement
235
235
[no value]
[no value]
AUTO-LITE BATTERY CORPORATION
[no value]
AUTO-LITE BATTERY CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0164.xml
advertisement
236
236
[no value]
[no value]
J. H. WILLIAMS & CO.
[no value]
J. H. WILLIAMS & CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0165.xml
advertisement
237
237
[no value]
[no value]
THE ELECTRIC STORAGE BATTERY CO.
[no value]
THE ELECTRIC STORAGE BATTERY CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0166.xml
advertisement
238
238
[no value]
[no value]
Drillet Corporation
[no value]
Drillet Corporation
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0167.xml
advertisement
239
239
[no value]
[no value]
ZENITH RADIO CORPORATION
[no value]
ZENITH RADIO CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0168.xml
advertisement
240
240
[no value]
[no value]
Advertisement: AC Spark Plugs
[no value]
[no value]
AC Spark Plugs
[no value]
[no value]
PopularScience_19441001_0145_004_0169.xml
advertisement
241
241
[no value]
[no value]
TINNERMAN PRODUCTS, INC.
[no value]
TINNERMAN PRODUCTS, INC.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0170.xml
advertisement
242
242
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0171.xml
advertisement
243
243
[no value]
[no value]
DEFOE SHIPBUILDING COMPANY
[no value]
DEFOE SHIPBUILDING COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0172.xml
advertisement
244
244
[no value]
[no value]
EVINRUDE OUTBOARD MOTORS
[no value]
EVINRUDE OUTBOARD MOTORS
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0173.xml
advertisement
245
245
[no value]
[no value]
Indian Motocycle Co.
[no value]
Indian Motocycle Co.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0174.xml
advertisement
246
246
[no value]
[no value]
L. & H. STERN, INC.
[no value]
L. & H. STERN, INC.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0175.xml
advertisement
247
247
[no value]
[no value]
EDMUND SALVAGE COMPANY
[no value]
EDMUND SALVAGE COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0176.xml
advertisement
248
248
[no value]
[no value]
WALTER KIDDE & COMPANY, INC.
[no value]
WALTER KIDDE & COMPANY, INC.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0177.xml
advertisement
249
249
[no value]
[no value]
THE PARKER APPLIANCE COMPANY
[no value]
THE PARKER APPLIANCE COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0178.xml
advertisement
250
250
[no value]
[no value]
UNIVERSAL CAMERA CORP.
[no value]
UNIVERSAL CAMERA CORP.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0179.xml
advertisement
251
251
[no value]
[no value]
ROMA WINE COMPANY
[no value]
ROMA WINE COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0180.xml
advertisement
252
252
[no value]
[no value]
TYSON BEARING CORPORATION
[no value]
TYSON BEARING CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0181.xml
advertisement
253
253
[no value]
[no value]
TAYLORCRAFT AVIATION CORPORATION
[no value]
TAYLORCRAFT AVIATION CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0182.xml
advertisement
254
254
[no value]
[no value]
Advertisement
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0183.xml
advertisement
255
255
[no value]
[no value]
AIRCRAFT ENGINEERING CORPORATION
[no value]
AIRCRAFT ENGINEERING CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0184.xml
advertisement
256
256
[no value]
[no value]
Allison
[no value]
Allison
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0185.xml
advertisement
257
257
[no value]
[no value]
HARLEY-DAVIDSON MOTOR CO.
[no value]
HARLEY-DAVIDSON MOTOR CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0186.xml
advertisement
258
258
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0187.xml
advertisement
259
259
[no value]
[no value]
VAN ROY COMPANY, INC.
[no value]
VAN ROY COMPANY, INC.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0188.xml
advertisement
260
260
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0189.xml
advertisement
261
261
[no value]
[no value]
THE COLEMAN LAMP AND STOVE CO.
[no value]
THE COLEMAN LAMP AND STOVE CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0190.xml
advertisement
262
262
[no value]
[no value]
THE ROMEC PUMP COMPANY
[no value]
THE ROMEC PUMP COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0191.xml
advertisement
262
262
[no value]
[no value]
UNITED STATES PLYWOOD CORPORATION
[no value]
UNITED STATES PLYWOOD CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0192.xml
advertisement
263
263
[no value]
[no value]
VERD.A.RAY CORPORATION
[no value]
VERD.A.RAY CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0193.xml
advertisement
264
264
[no value]
[no value]
SNAP-ON TOOLS CORPORATION
[no value]
SNAP-ON TOOLS CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0194.xml
advertisement
264
264
[no value]
[no value]
MILWAUKEE DUSTLESS BRUSH COMPANY
[no value]
MILWAUKEE DUSTLESS BRUSH COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0195.xml
advertisement
264
264
[no value]
[no value]
THE MB MANUFACTURING CO.
[no value]
THE MB MANUFACTURING CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0196.xml
advertisement
264
264
[no value]
[no value]
Advertisement: PLASTIC WOOD
[no value]
[no value]
PLASTIC WOOD
[no value]
[no value]
PopularScience_19441001_0145_004_0197.xml
advertisement
265
265
[no value]
[no value]
AAF
[no value]
AAF
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0198.xml
advertisement
266
266
[no value]
[no value]
CREST SPECIALTY CO.
[no value]
CREST SPECIALTY CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0199.xml
advertisement
266
266
[no value]
[no value]
THE HOUSE OF WATCHES
[no value]
THE HOUSE OF WATCHES
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0200.xml
advertisement
266
266
[no value]
[no value]
THE AMERICAN PAD & TEXTILE CO.
[no value]
THE AMERICAN PAD & TEXTILE CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0201.xml
advertisement
267
267
[no value]
[no value]
PROFESSIONAL BLADE CO.
[no value]
PROFESSIONAL BLADE CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0202.xml
advertisement
267
267
[no value]
[no value]
HENRY LEONARD & THOMAS, INC.
[no value]
HENRY LEONARD & THOMAS, INC.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0203.xml
advertisement
268
268
[no value]
[no value]
BELL WATCH COMPANY
[no value]
BELL WATCH COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0204.xml
advertisement
268
268
[no value]
[no value]
BELL WATCH COMPANY
[no value]
BELL WATCH COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0205.xml
advertisement
268
268
[no value]
[no value]
Argus, Inc.
[no value]
Argus, Inc.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0206.xml
advertisement
268
268
[no value]
[no value]
J. W. MORTELL CO.
[no value]
J. W. MORTELL CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0207.xml
advertisement
269
269
[no value]
[no value]
THE MARLIN FIREARMS CO.
[no value]
THE MARLIN FIREARMS CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0208.xml
advertisement
269
269
[no value]
[no value]
JOHNSON MOTORS
[no value]
JOHNSON MOTORS
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0209.xml
advertisement
270
270
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0210.xml
advertisement
271
271
[no value]
[no value]
SHERRILL RESEARCH CORP.
[no value]
SHERRILL RESEARCH CORP.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0211.xml
advertisement
271
271
[no value]
[no value]
PRESSTITE ENGINEERING COMPANY
[no value]
PRESSTITE ENGINEERING COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0212.xml
advertisement
271
271
[no value]
[no value]
ZENITH RADIO CORPORATION
[no value]
ZENITH RADIO CORPORATION
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0213.xml
advertisement
272
272
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0214.xml
advertisement
273
273
[no value]
[no value]
MORTON AIRCRAFT CORP.
[no value]
MORTON AIRCRAFT CORP.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0215.xml
advertisement
273
273
[no value]
[no value]
The Franklin Glue Co.
[no value]
The Franklin Glue Co.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0216.xml
advertisement
273
273
[no value]
[no value]
WOOD CONVERSION COMPANY
[no value]
WOOD CONVERSION COMPANY
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0217.xml
advertisement
274
274
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0218.xml
advertisement
275
275
[no value]
[no value]
ALLIED RADIO CORP.
[no value]
ALLIED RADIO CORP.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0219.xml
advertisement
275
275
[no value]
[no value]
INDUSTRIAL GLOVES CO.
[no value]
INDUSTRIAL GLOVES CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0220.xml
advertisement
275
275
[no value]
[no value]
ALLIED RADIO CORP.
[no value]
ALLIED RADIO CORP.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0221.xml
advertisement
275
275
[no value]
[no value]
Smooth-On Mfg. Co.
[no value]
Smooth-On Mfg. Co.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0222.xml
advertisement
276
276
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0223.xml
advertisement
277
277
[no value]
[no value]
CHICAGO WHEEL & MFG. CO.
[no value]
CHICAGO WHEEL & MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0224.xml
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277
277
[no value]
[no value]
MARINE MODEL CO.
[no value]
MARINE MODEL CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0225.xml
advertisement
277
277
[no value]
[no value]
WENDELL MFG. CO.
[no value]
WENDELL MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0226.xml
advertisement
277
277
[no value]
[no value]
Burgess Battery Company
[no value]
Burgess Battery Company
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0227.xml
advertisement
278
278
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0228.xml
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279
279
[no value]
[no value]
CELLO-NU PRODUCTS
[no value]
CELLO-NU PRODUCTS
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0229.xml
advertisement
279
279
[no value]
[no value]
WILSON INDUSTRIES, INC.
[no value]
WILSON INDUSTRIES, INC.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0230.xml
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279
279
[no value]
[no value]
DU PONT
[no value]
DU PONT
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0231.xml
advertisement
279
279
[no value]
[no value]
LaisterKauffmann aircraft corporation
[no value]
LaisterKauffmann aircraft corporation
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0232.xml
advertisement
280
280
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0233.xml
advertisement
281
281
[no value]
[no value]
Advertisements
[no value]
UNIVERSAL
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0234.xml
advertisement
281
281
[no value]
[no value]
Advertisement: Medico
[no value]
[no value]
Medico
[no value]
[no value]
PopularScience_19441001_0145_004_0235.xml
advertisement
281
281
[no value]
[no value]
JACOBS MFG. CO.
[no value]
JACOBS MFG. CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0236.xml
advertisement
281
281
[no value]
[no value]
DYNAMIC WELDER CO.
[no value]
DYNAMIC WELDER CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0237.xml
advertisement
282
282
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0238.xml
advertisement
283
283
[no value]
[no value]
Advertisements
[no value]
[no value]
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0239.xml
advertisement
284
284
[no value]
[no value]
SOUTH BEND LATHE WORKS
[no value]
SOUTH BEND LATHE WORKS
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0240.xml
advertisement
285
285
[no value]
[no value]
Wm. H. Wise & Co., Inc.
[no value]
Wm. H. Wise & Co., Inc.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0241.xml
advertisement
286
286
[no value]
[no value]
LIGGETT & MYERS TOBACCO CO.
[no value]
LIGGETT & MYERS TOBACCO CO.
[no value]
[no value]
[no value]
PopularScience_19441001_0145_004_0242.xml