Elementary linear perspective of form and shadow ... Complete in itself ... For draftsmen, artists, and industrial drawing courses in preparatory and high schools, etc. In two parts.. (1891)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 20
a pencilsharpened on a fine file, to a thin edge, rather than a roundpoint, since it will thus keep sharp much longer. 4. Rulers.—For drawing on stretched paper, use a T rule, fordrawing all lines from right to left; and a right angled triangle,for drawing lines perpendicular to these. With loose… … a side of the triangle on ah^ and bring up the ruler ac, as shownin Fig. 1. Hold the ruler fast, and slide down the triangle to theposition (2) when pd will be parallel to ah. 6. To draw perpendicidars in ohlique positions.—Slide the tri-angle, as before, till de passes through jo, then d being a…
Perspective · Mechanical drawing
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