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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 89

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 89
provided for that purpose.The pen requires for this purpose to be cleaned ofthe ink that is apt to dry in it. In Figure 108 line shading is shown applied to aball or sphere, while in Figure 109 it is shown ap-plied to a pin in a socket which is shown in section.By showing the hollow in connection… … perhaps is more clearly shown in the piece oftube in Figure no, where the thickness of the tubeshowing is a great aid to the eye. So, likewise, the

Mechanical drawing

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