I FIRMLY believe the destiny of the submarine is to stop all future maritime wars between countries. A tremendous power for destruction, the submarine is in itself useless for purposes of invasion. The moment the submarine becomes visible it becomes vulnerable.
IF the war has taught us anything it has taught us that the submarine must be reckoned with both as an annihilator of battleships and as a destroyer of commerce. Of the dozens of instrumentalities invented for killing on a wholesale scale it is the most terrible.
A MINIATURE gallows from which hangs a defective fusible plug responsible for a boiler explosion which occurred on board the steamship Jefferson, near Norfolk, Va., on May II, 1914, is one of the interesting curios on the walls of the office of Secretary Redfield, of the Department of Commerce in Washington.
Protecting a Bridge from Villa with Acetylene Lamps
The Gentlest Bullet
Swimming by Searchlight
A Strange Persian Cistern
IN the manufacture of brass cartridge cases for shrapnel or high-explosive shells, fifteen to twenty operations are required before the case is completed. Starting with a brass disk or blank, a number of cupping, drawing and indenting operations are performed before the case is ready for the heading operation.
A Vacuum Washing-Machine Which Sucks Dirt Out of Fabrics
A Convenient Milk and Butter Slide for Refrigerators
An Ice-Grip With Many Uses
Another Way to Rejuvenate Eggs
WHERE is the cook who has never burnt her hands draining scalding hot water from vegetables? Blistered hands may now become mere reminiscences, for there are upon the market excellent vegetable kettles of aluminum with lids held in place safely by clamps.
Professor of Astronomy in the University of Illinois
Wanted: A Standard Eye
The Selenium Cell Is Packed in Ice
The Stars in Orion
Measuring Cloth in the Roll
A Marvelous War Map
A Successful Railroad
A New Way of Loading Steamers from Freight Cars
Bad Roads Make Bad Going
ONE of the standard problems of astronomy is the exact determination of the amount of light that comes from each of the stars. Not that the knowledge of the fraction of a candle power of each star is of any interest or importance, but that the measures are valuable for future reference, especially to determine the gradual changes in light caused by the dying out or the brightening of these distant objects.
Water Rises to Three Hundred Feet in New York Sky Scrapers
War and Trade
What a Lot of Machinery to Chase Villa!
Tracking Villa in the Wilds of Mexico
We Wonder If Villa Has These Conveniences
Our Punitive Expedition Into Mexico
Things the Recruiting Office Never Mentions
Does This Mark the Beginning of a New Labor Era?
The Modern Orderly Rides Not on a Snorting Horse But on a Swift Motor-Cycle
Nothing Is Unusual in Europe Now
Repairing the Human Wrecks of War
Like Other Countries Germany Did Not
Take Kindly to Its First Submarine
French Life Along the Western Battle Front
Behind the Scenes of the War
Making and Using the Booming Guns
How a Zeppelin Raider Appears to Englishmen
Straw Hat Insurance
A Buzz-Saw Safety Razor
Fooling the Pickpocket
A Tray to Hide Unsightly Cigar Ashes
These Desert Mates Never Quarrel
This Gold Dredge Is a Glutton
Two New Colossal Bridges
A Device for Numbering Photographic Plates and Films
Submitting Photographs for the London Exhibition
MODERN engineering requirements coupled with a persistent demand for labor-saving devices have brought into being several types of trench-digging apparatus which are of ingenious construction. Of all manual labor, digging trenches by hand or excavating on a large scale by hand is the most laborious and expensive method.
A WAR strength infantry company lay in our rear. We walked toward its far-off target, nearly in the line the bullets would take, a few yards’ divergence to the left giving us the safety margin we felt would be enough with such expert marksmen.
TO be suspended in mid-air over the vortex of the boiling, swirling Whirlpool Rapids at Niagara Falls, Ontario, with an unintercepted view of the rapids on one side and of Niagara Glen and the lower river on the other, is a dream which Spanish engineers, backed by Spanish capital and patents, have realized.
A New Era in Water Power Begun at the Henry Ford Farms
Sterilizing Water by Ultra Violet Light
What Blood Pressure Means and How It Is Measured
A Clean Way of Removing Pens from Their Holders
A Summer-House from Straw Bottle-Casings
A Water-Wagon in Actual Use
Learning Arithmetic With a Woman’s Invention
Austria Exhibits Paper Substitutes for Cloth
An Automobile-Bed for the Tourist
HENRY FORD'S Farms serve as an experimental field for the various appliances being developed by Mr. Ford. His new home is located on the farms. This is near Dearborn, Michigan, on the north bank of the river Rouge, on the site of a pioneer mill.
Some Ingenious New Accessories For the Touring Car
A New Ford Folding Bed
Rain Protector for Automobile Wind-Shield
A Handy Automobile Grease-Gun
A Glass Hood for Automobiles
AN entire bed equipment which weighs but fourteen pounds, and which may be folded and packed away, with the exception of blankets and comforters, in a tool box, is the latest thing devised for Ford owners who wish to avoid hotel bills. The equipment includes a piece of strong canvas, two poles or iron bars for spreaders, one for the foot and the other for the head; four half-inch iron rods for supports leading from the car-top supports to the four corners of the canvas mattress, and four ordinary straps with buckles.
MORE or less periodically a lurid account crops out in the newspapers to the effect that some millionaire, usually a member of the Rothschild family, has paid a fabulous sum for a butterfly—a sum ranging anywhere, according to the vividness of the reporter’s imagination, from five hundred dollars to ten thousand dollars.
X-RAY pictures have been used as evidence in law suits brought for personal injuries in order to show the injured parts clearly. To mark the negative for identification, lead letters (opaque to X-Rays) have been used, arranged at one side of the part photographed.
REASONING that the easiest way to dispose of a burglar is to scare him with the thing he most fears, and that is a pistol, a Chicago man, R. C. Mayberry, has devised an apparatus which will fire off cartridges and do the scaring automatically at the very moment the burglar begins work.
LAUGH as we may at woman’s vanity, it is nevertheless a weakness which has been so greatly commercialized and traded on that thousands of manufacturers are maintaining large and profitable plants solely for the making of such toilet novelties and toilet accessories as powder puffs, cases for powder puffs, mirrors, rouges of all kinds, etc.
SOME people maintain that a camera will not lie. They are correct. A camera shows exactly what happens; but if you place the wrong construction upon what you find in the picture that is entirely your own fault. If, in a screen comedy, an automobile proceeds casually to ascend the front of a skyscraper, don’t miss the remainder of the reel by rushing to the box office to enquire the make of the machine.
THERE is no sound scientific reason why a household refrigerating machine should not be a commercial success and go into very general use in private homes. There is a wide demand for such machines, and much money and engineering skill have been expended in their development.
Novel system of highway illumination along the crest of the Kensico reservoir
neer of the Catskill aqueduct system of water supply of
Navigating a River Boat by Sound
Doing Away With the Dish-Cloth
Bird Protection for Electric Lines
It Saves the Cook’s Hands
THERE are about two and one-half million automobiles in use at the present time. By the end of the year their number will be well over three million. All of them consume gasoline. There are also three hundred thousand motor-boats, forty-five thousand motortrucks, thirty thousand gasoline farm tractors, and an untold number of stationary engines, all dependent on gasoline.
What Time Is It? Half-Past Aunt Sarah by This Watch
Are Metals Alive?
Answers to Sam Loyd’s April Puzzles
Answers to May Puzzles
ICE can be made artificially for summer skating. It has the disadvantage of melting. For that reason, chemists have devised glassy surfaces which will stand heat and which will be as acceptable as ice in winter. Some years ago a German patented a process, in which thick pasteboard plates are immersed in very hot linseed oil and varnish, mixed with glue.
Packing the Things You Never Can Cram into Your Suitcase
The Fruit Picker’s Sleeve-Chute
Safety-First for Window-Cleaners
Muffler for Bowling-Pins
Telephone-Mouthpiece Deadens Outside Sounds
Down with the Portcullis, and Your Fish Is Caught
Improved Pocket-Knife Punch
A Magnifying Needle-Threader
Mattress Handles Lighten Housework
A Perfume-Wafting Fan
An Umbrella with an Electric Fan
Convenient Holder for Toilet Articles
The Mechanical Fly Swatter
Two Kitchen-Forks in One
Cord Reel Is Telephone Convenience
A Sanitary Butter Dish
THE electric heater shown in the illustration is very serviceable for quickly heating small quantities of water or other liquid in a suitable vessel. The large heating surface insures very quick action. An easily detached connector adds to the convenience.
MANY of the cheaper cars develop an annoying series of noises after they have been in use for a time, and most of these may be entirely eliminated by a little careful attention. The most common cause, outside of the mechanical depreciation, is looseness at the hood, as this rubs against the hood-ledge on the radiator and dash, and produces squeaking.
How to Build and Fly the Malay, Blue Hill Box and Tetrahedral Cell Kites
Building the Malay
How to Protect the Surface of a Laboratory Table
A Mission Stain
Gaging the Stack Draft
A Safe Way of Bending Pipes
A Toy Rubber-Elastic Winder
A Cheap Beam-Compass
Removing Waterproof India Ink Spots
How to Make a Polariscope to be Used with a Microscope
To Stop a Lathe Quickly
Cutting Tile at Any Angle
A Substitute for a soldering Iron
Taking the Squeak Out of a Sign
Handling Fine Screws
A Home-made Thumb-Screw
How to Make a Barometer
Making a Long Distance Shot with a Shotgun
Oiling Hammer Handle
Harry F. Rinker
THOUGH the kite is usually thought of as having four corners, with a grotesque face painted on each side and terminating in a tail of rags, the fact is that this sort of kite has disappeared. Today every boy who is scientifically inclined, can build for himself kites which are as much ahead of the one Benjamin Franklin used as the motor-cycle is an improvement over the bicycle.
IN rigging the boat with a single sail, known as “cat-rig,” the mast should be stepped well forward, say about 18 ins. from the stem. If a sloop rig is preferred, the mast is stepped farther aft, to make more room for the head-sail or jib. The cat-rig is the best for a small boat.
THE effect of increased resistance in a freely oscillating circuit was described in the May article of this series. It was pointed out that the more rapid loss of energy, brought about by the presence of this added resistance, reduced the number of current oscillations in the circuit.
We want you to tell our readers how you have overcome your wireless troubles. Every radio operator, amateur or professional, has encountered difficulties in building or using his apparatus. Many different people are bothered by the very same problems day after day.
The Construction of an Automatic Battery Circuit-Breaker
How to Make a Rural Mail-Box Alarm
Japanese Wireless Telephone
An Electric Weather-Vane Indicator
Electrical Lighting Device for the Gas-Range
A. R. MacPherson
TO the experimenter in the field of electro-chemistry there is much unexplored knowledge which in time will prove of inestimable value to the chemistry of commerce, particularly in the methods of generating electricity through chemical actions, which at the present day, though apparently satisfactory, are very inefficient.
THE radio tower recently erected at Tufts College, Medford, Massachusetts, is attracting unusual attention. In September, when the tower was completed to a height of over 275 ft., one of the temporary guy ropes parted during a high wind and allowed the tower to topple over.
W. L. K., Cincinnati, O., inquires: Q. I. What is your opinion of the carborundum crystal as compared with other mineral detectors? Are a battery and potentiometer required for the maximum degrees of sensibility? What color is the most sensitive?
Automatic Feeding-Hopper Built for Twenty-five Cents
The Left-handed Woman’s Home Appliances
How to Make Artificial Marble
THIS sun-dial can be made easily and it will give accurate results. While the variation of time in all parts of the United States will be slight, the most accurate reading will be made between the 35th and 45th parallels of northern latitude as this is the area it is designed to cover.
THE ideal home which we will describe this month, is a building in which everything was studied out in advance; in which every dollar was reckoned before the job was started and one which, through attention to details of small things, was kept down to a very reasonable figure.