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)
d to draw the head, the pro-cess is as follows: For a view showing one corner infront, as in Figure 168, a circle of the given diameteracross corners is pencilled, and the horizontal centre-line a is marked, and the triangle of 45 degrees is EXAMPLES IN BOLTS, NUTS, AND POLYGONS. 127 rested against… … <^ Fig. 168. meetinor the horizontal line a, where it meets the cir-cle. The triangle is then moved to the left, and lined, joining the ends of b and c, is marked, and by mov-ing it still farther to the left to position T 2, line e ismarked. Lines b, c, d, and e are, of course, the onlyones…
Mechanical drawing
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