Gage, Alfred P. (Alfred Payson), 1836-1903 · Boston, London, Ginn · leaf 125
108 MOLAR DYNAMICS. 89. The screw is another variety of the inclined plane, asmay be shown by winding a triangular piece of paper arounda cylinder, e.g. a lead pencil (Fig. 67). The hypotenuse will 3 … Fig. 67. Fig. 68. form a spiral about the cylinder resembling the threads ofa screw. In actual practice the screw consists of two parts: (1) aconvex grooved cylinder, or screw, S (Fig. 68), which turnswithin (2) a hollow cylinder, or nut, N. The concave surfaceof the latter is cut with a thread…
Physics
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