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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 138

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 138
s shown by theline D, which is the full diameter across corners. Thisis apparent, because from point O, along line O B, toI, thence to the dot, thence down to line i on O P, and EXAMPLES IN BOLTS, NUTS, AND POLYGONS. 13^ along that to O, encloses a square, of which either fromO to the dot, or the… … Fig. 182. After graphically demonstrating the correctness ofthe scale we may simplify it considerably. In Figure182, therefore, we have applications shown. A is ahexacron, and if one of its sides be measured, it will j^S MECHANICAL DRAWING SELF-TAUGHT. be found that it measures the same as along…

Mechanical drawing

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