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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 228

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 228
Fig. 249. (Page 210.) DKAiy/XG GEAR WHEELS. 211 … Fig. 250. ?A2 MECHANICAL DRAWING SELF-TAUGHT. divided with great facility and accuracy by a verysimple process, which we take from Prof. RankinesMachinery and Mill Work, and is illustrated in Fig-ure 252. Let O B be tangent at O to the arc O D,of which C is the centre. Draw the chord D O, bisectit…

Mechanical drawing

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