The Popular Science Monthly Volume 97

The Popular Science Monthly Volume 97

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ... long time and will always be just where it is needed--held to the coat pocket by a clip, giving the smoker a twofold assurance of a light when he most needs one--which often happens when he is out on a tramp, miles away from houses and his fellow man. Why Not Make Your Own House Models? " ON'T throw that cor rugated cardboard away. Let us make the new house from it," sug York Fire Department, in-' gested the prospective vented this phonograph builder to the architect. fire-alarm. They did. The result Theexplanation of this novel invention sounds like the old rhyme about "the fire burned the stick, the stick beat the pig, the pig jumped over the stile--" The house containing this phonograph fire-alarm..is. wired. The sensitive "heat" wires meet fuses, which ' form an electric connection with a magnetic coil in the alarm-box. Heat so affects this that an iron weight is released, which starts the phonograph record. For fifteen minutes this record recites the location of the fire, the telephone receiver is lifted, and'Cen was the tiny model shown in the illustration. This is how the experimenter explains the construction of the cardboard house: "First we cut out the' walls. straight up and down, ' and made openings for the doors and windows." Ve set up partitions between' the rooms precisely as the architect had them in his plans. Each story was built separately, and the roof went on last. The sections were then pieced to-gether. "The result helped us to visualize our prospective house, and to correct faults chanical work. In repairing, overhauling, and balancing airplanes, it is often necessary to A New Screw-Bench for Airplane Work SCREW-BENCH having a vertical and...show more

Product details

  • Paperback | 360 pages
  • 189 x 246 x 19mm | 644g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236765885
  • 9781236765888