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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 83

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 83
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-hatchincrmay be made to denote the material of which the 82 MECHANICAL… … Lead. Wood. Steel. Fii 95- involve very much more labor than it is worth inordinary machine shop drawings, except in the caseof cast iron and wood, these two beino- shown in the

Mechanical drawing

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