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)
shaded by lines, the lines on the taper parts meetingthose on the parallel part A. and becoming morenearly parallel to the axis of the piece as the centreof the piece is approached. The same is the casewhere a pwc<> having a outline is drawn, which is shown in Fig the set of the bow-pen… … 107. the piece, as upon the lines A, B, C, the dotted linesshowing the radius for each curve. The lines are made hner by closing the pen pointsby means of the screw 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…
Mechanical drawing
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