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. 178, Fig. 179. then lines c to d, and c and d to e, where A meets, thecircle will describe a trigon. If the figure is to standvertical, all that is necessarv is to draw the line a … vertical, as In Figure 180. A ready method of getdngthe dimension across corners, across the flats, or thelength of a side of a given polygon, is by means ofdiagrams, such as shown In the following figures,which form excellent examples for practice. X Draw the line O P, Figure 181, and at a right…
Mechanical drawing
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