Industrial drawing and geometry; an introduction to various branches of technical drawing (1911)
Spooner, Henry John, 1856- · London, New York [etc.] Longmans, Green, and co. · leaf 139
Pig. 368.—Block of steps. Pigs. 369, 370.—Notched joint.120 … Figs. 371, 372.—Co, OBLIQUE OR PICTORIAL DRAWING 121 to select one of the set-sqnare angles. Thus it will be seen that 45° has been used in Fig. 364, 30° in Fig. 365, and 60° in Fig.366, whilst in Fig. 367 it is IS. Circles on planes perpendicular to the paper project as ellipses, and the rules…
Mechanical drawing · Geometrical drawing
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