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 (1883)
point as at c.From this point as a centre we draw a circle D, pass-ing through both lines a, b. All we now have to do isto find what part, or how much of the circumference, ofthe circle is enclosed within the two lines. In the ex-ample we find it is the one-twelfth part; hence thelines are 30… … by projecting or prolonging the lines until they meetas at points D, E, and F, and use these points as the cen-tres wherefrom to mark circles as G, H, and I. Then,from circle H, we may, by dividing it, obtain the angle c5 MECHANICAL DRAWING SELF-TAUGHT. of A to B or of B to A. By dividing circle I…
Mechanical drawing
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