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)
perhaps is more clearly shown in the piece oftube in Figure no, where the thickness of the tubeshowing is a great aid to the eye. So, likewise, the … Fig. 109. hollow or hole is more clearly seen where the piece isshown in section, as in Figure ill, which is the caseeven though the piece be taper as in the figure. Ifthe body be bell-mouthed, asin Figure 112, the hollowcurve is readily shown bythe shading; but to line shadea hollow curve without…
Mechanical drawing
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