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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 (1883)

Rose, Joshua · Philadelphia, H.C. Baird & Co.; London, S. Low, Marston, Searle & Rivington · leaf 29

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, 1883, leaf 29
Fig. 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 pap(!r is nearly the full size of the board, itdocs not much matter as to its precise location on \\\vboard, but otherwise it is best to place it as near thel(*ft-hand edcreof iIk bonrd as convenient, as is sliownin Fi<rur(* 14. THE DRAWING BOARD. 29 The lower edge, D, Figure 15,…

Mechanical drawing

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