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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 125

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 125
Fig. 161. c ; i Fig. 162. … Fig. 163. h across corners. In the case of a hexagon the EXAMPLES IN BOLTS, NUTS, AND POLYGONS. i2$ middle of the three flats is equal in width to the di-ameter of the bolt, and .the other two are one-half itswidth; all three, therefore, being marked with the sameset of compasses as gives the…

Mechanical drawing

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