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. 168. meeting 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, dy and e are, of course, the onlyones inked in.… … Fig. 169. is marked as before, and with the triangle placed asshown at T 1, line ay passing through the centre ofthe circle, is drawn. By moving the triangle to theright its edge B will be brought into position to mark MECHANICAL DRAWING SELF-TAUGHT. line 6, also passing through the centre of the…
Mechanical drawing
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