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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 84

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 84
Fig. 97. Fig. 98. part of the piece represented, as will be seen from thefollowing examples. In Figure 97 is a piece thatcontains a hole, the fact being shown by the circle … Fig. 99. being thickened at A. If the circle were thickened on the other side as at B, in Figure 98, it would show that it represented a cylindrical stem instead of a hole, In Figure 99 is represented a washer, the surfaces g4 MECHANICAL DRAWING SELF-TAUGHT. that are in the shadow side being shown…

Mechanical drawing

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