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  2. New Ideas in Science and Invention.

    What motorist has not sighed for a spark plug that would clean itself. This much is now claimed by Einar Minge of America, who has been granted a patent for what he ... [ILLUSTRATED]

    Article : 80 words
  3. "CRAWL STROKE" FOR MOTOR BOATS.

    The Australian crawl principle that produces some of our fastest swimmers now has been applied to motor, boats, says "Popular Science Monthly." A new propeller invented ...

    Article : 92 words
  4. ELECTRIC LAWN MOWER

    Herbert H. Dahl, U.S.A., has recently been "granted a patent which covers an electrically-driven lawn mower, having a revolving blade, sharpened so as to effectively cut ... [ILLUSTRATED]

    Article : 119 words
  5. POWERFUL ENGINE.

    The Engineering Division of the U.S Army Air Service has designed an experimental engine, which is expected to develop 2400 horsepower The new en sine is of the "X" ...

    Article : 75 words
  6. A NEW VIBRATOR.

    This is an Australian invention by an Australian—Mr. G. de Cairos Rego, of Sydney, who is the musical critic of "The Daily Telegraph." This is not Mr. Rego's ... [ILLUSTRATED]

    Article : 144 words
  7. SOUNDS TO CONTROL FIRES.

    The use of sound waves as fire extinguishers and a weapon in warfare is called a possibility by Howard Coonley, civilian director for the Chemical Warfare ...

    Article : 144 words
  8. NO WEEDS.

    Unsightly weeds along the garden path an doomed, according to information from Germany. Certain compounds have just been patented that may be added to the gravel ...

    Article : 77 words
  9. NOVEL SHOWER BATH.

    A woman this time, Nannie L. Wallen, has devised a type of shower bath that can be attached to any tub and receives its supply of water from the regular faucets. ... [ILLUSTRATED]

    Article : 131 words
  10. LIGHTHOUSE FOR AIRSHIP LINE.

    Beams are reflected from its lights and from the smooth curved base of a beacon erected at the Croydon aerodrome, England, [?]o guide airships to safe landings. The ... [ILLUSTRATED]

    Article : 67 words
  11. CHEAP FUEL FROM DUST.

    If you pump cornstarch with air into an enclosed tube and ignite the mixture with an electric spark, it will explode. Recent Government experiments have shown in dust ...

    Article : 167 words
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