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)
on its head, as in Figure 163, may begiven. It is the better plan, both in square and hexagonheads, to give the view in which the full face of a flatis presented, that is, as in Figures 155 and 163; be-cause, in the case of the square, the length of a sideand the width across the head are both… … Fig. 161. c ; i Fig. 162.
Mechanical drawing
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