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  2. SCIENCE INVENTION IDEAS

    REGULATION separatory funnels with glass stopcocks are rather fragile and expensive, but an excellent substitute may be ... [ILLUSTRATED]

    Article : 93 words
  3. NEW MICROPHONE invented

    A SPECIAL microphone which responds to the sounds produced by the telephone, and reproduces them in tremendous volume, has been designed for the assistance of deaf ... [ILLUSTRATED]

    Article : 205 words
  4. Hanging Curtain Rods

    THE little paper or cardboard square illustrated is an aid in fastening curtain rod brackets so that they are uniformly located and so that the rods ... [ILLUSTRATED]

    Article : 113 words
  5. Curtiss Helicopter Rises in Secret Test

    ONE question that has been raised, concerning the new Curtiss helicopter has now been answered. It can go up. In secret tests held recently in the hangar at ...

    Article : 126 words
  6. Flux For Soldering Tin Roof

    WHEN resin is used as a flux for soldering a tin roof, some of it flows out of the seam and on to the surface of the tin which is to be painted. In a short time, the paint ...

    Article : 115 words
  7. To Prevent Warping

    TO prevent wood, especially smaller blocks used as base-boards for various Instruments, from warping, all that need be done is to dry the wood thoroughly, and then coat ...

    Article : 84 words
  8. Mending Celluloid

    CELLULOID objects, such as spectacle frames and combs, of ten can be repaired when broken by painting the abutting edges with concentrated acetic acid and pressing ...

    Article : 35 words
  9. Tool for Straightening Thin Piano Wire

    MANY builders of model aeroplanes have difficulty in straightening thin piano wire. Pliers, if not designed for the work, make a bungling job of it. so it is wise to ... [ILLUSTRATED]

    Article : 103 words
  10. A Socket-Wrench Hint

    IN working on ray car recently, I came across some nuts (writes a correspondent) which none of the sockets In my ... [ILLUSTRATED]

    Article : 64 words
  11. Asbestos-filled Plug

    CONSISTING of a metal casing filled with asbestos or other fireproof material, a new electric plug, recently placed on the market, Is said not to burn out. The Inside of an ...

    Article : 41 words
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