Manual training : first lessons in wood-working (1888)
Compton, Alfred G. (Alfred George), 1835-1913 · New York and Chicago, Ivison, Blakeman and company · leaf 34
nd the break-ing force measured. At the proper time youwill find no difficulty in understanding theselarger machines and operations, if you haveunderstood the smaller ones. In the machineshown in Fig. 8, the piece to be broken isheld by the clamps A and B. The wheel C Wood - Working. 19 being… … force applied at E is as many times greaterthan this as the length of H F is greaterthan that of E H. As the piece stretchesbefore breaking, the pull is applied at firstby means of the screw /, and afterwards by C. 20 Manual Training. Our experiments with these pieces of woodagree with our…
Woodwork (Manual training)
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