Amateur mechanics ... a book for old and young who like to make things .. (1907)
Popular mechanics magazine, Chicago. [from old catalog] · Chicago, Popular mechanics · leaf 39
o the movemenl of the train, then the trainwould be Increasing its speed at the rate of4.. ft. per second If the thread la tied at the 17-in. mark,then each half inch will represent the miles i HOW TO MAKE A QALVANOSCOPE To make a galvanoscope for detectingsmall currents of electricity, a magnet,… … I or Detecting Small Currents C. This galvanoscope will detect the weakest current.—Contributed by John o 2537 N. Chadwick St., Philadel- ANTIDOTE FOR SQUIRREL PEST To the owner of a garden in a town wheresquirrels are protected by law, life in thesummer time is a vexation. First the squir-rels dig…
Handicraft · Amusements
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