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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 82

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 82
Fig- 93-in Figure 93 on the right-hand edge of the key, butnot on the left-hand ed^e. … Fig. 94. A remarkable instance of this kind is shown inFigure 94, when the vertical lines appear to the eyeto be at a considerable angle one to the other, althoughthey are parallel. The lines in sectional shading or cross-hatchingmay be made to denote the material of which the 82 MECHANICAL DRAWING…

Mechanical drawing

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