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)
Fig. io8. 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 is shown in section, as in Figure in, which is the case even though the piece be taper as in the figure. If the body be bell-mouthed, as in Figure 112, the hollow curve is readily shown by the shading; but to line shade a hollow curve…
Mechanical drawing
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