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)
rig. 14. than thumb tacks. The objection to ordinary tacks isthat they are more difficult to remove, but they are, asstated, more desirable for use. … Fig. 15. If the paper is nearly the full size of the board, It * much matter as to its precise location on the boari. but otherwise it is best to place it as near the oard as convenient, as is shownin Figure 14. THE DRAWING BOARD. 2g The lower edge, D, Figure i 5, of the paper, however,should not…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
