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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 169

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 169
Fit 2I5- for threads. It may be pointed out, however, that toobtain as accurate a division as possible of the linesthat divide the pitch, the pitch may be divided upon MECHAXICAL DRAUIXG SELF-TAUGHT. a diagonal line, as F, Figure 216, which will greatlyfacilitate the operation. … T:z. 216. Before going into projections it may be as well togive some examples for practice. ;:v-1 ■:- * 10i£ Section through A. B. *> . S/eeteinches* I emtion ofRod, with j Brass

Mechanical drawing

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