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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 (1889)

Rose, Joshua · Philaelphia, H.C. Baird & co.; [etc., etc.] · leaf 161

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, 1889, leaf 161
es, as shown in the figure.But the thread cannot be sketched on a bolt by thismeans unless temporary lines are used to get thethread from, these temporary lines being drawn torepresent a bolt one-fourth the depth of the thread too i6o MECHANICAL DRAWING SELF-TAUGHT, large in diameter. Thus, in… … Fig. 208 a. the order of procedure being, shown in Figure 209.The lines for the full diameter of the thread being

Mechanical drawing

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