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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)

Rose, Joshua · Philaelphia, H.C. Baird & co.; [etc., etc.] · leaf 127

An illustration from 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, leaf 127
Fig. 165. To draw the end view of a hexaoron head, first drawa circle of the diameter across the flats, and then rest 126 MECHANICAL DRAWING SELF-TAUGHT. the triangle of 60 degrees on the blade soi the square,as at T I, in Figure 165, and mark the lines a and b.Reverse the trianorle, as at T 2, and… … Fig. 166. d. Then place the triangle as in Figure 166, anddraw the lines e and/] If the other view of the head is to be drawn, thenfirst draw the lines a and b in Figure 167 with thesquare, then with the 60 degree triangle, placed onthe square S, as at T i, draw the lines c, d, and turn-ing the…

Mechanical drawing

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