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Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments, elementary instruction in practical mechanical drawing together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers (1883)

Rose, Joshua · Philadelphia, H.C. Baird & Co.; London, S. Low, Marston, Searle & Rivington · leaf 226

An illustration from Mechanical drawing self-taught: comprising instructions in the selection and preparation of drawing instruments, elementary instruction in practical mechanical drawing together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers, 1883, leaf 226
Fiff. 248. Figures 252, 253, 254, 255, and 256. The pitch-circleis drawn by the construction for drawing an ellipsethat was given with reference to Figure Si, but asthat construction is by means of arcs of circles, andtlierefore not strictly correct, Professor IMcCord, in aniirticle on clliplical… … Fig. 249. (Page 210.) DKAiy/XG GEAR WHEELS. 211

Mechanical drawing

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