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)
Fig. 240. hub, a sectional view of a section of the wheel may begiven, as in lML:ure 240, which represents a section ofa wheel, and a j)inion, and on these two views all thenecessary dimensions may be marked. X Il i /
Mechanical drawing
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