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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 81

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 81
Fig. 91. end, notwithstanding that the two ends are completelysevered where the slots G, I, come, because thespacing and direction of the cross-hatching are equalon each side of the slots, which they would not be ifthey were separate pieces. … Fig. 92. Section sliacling or cross-hatching niay sometimes(.iiise the lines of tlie drawing to appear crooked tothe eye. Thus, in Mgure 92, the key edge on the): ;ht aj)pears nirvixl inwards, while on tlu; Ic ft SHADOIV LINES AND LINE SHADING. gi the key edge appears curved outwards, although…

Mechanical drawing

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