Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 82
Roman Doric Order. PRINCIPLES OF SHADES AND SHADOWS 71 … Cornice. 72 SHADOWS OF LINES jection, a line making an angle of 45° with the GL. (Chap.I, Art. 27.) Axiom II. The shadow of a straight line perpendicularto one of the coordinates, is a line making an angle of 45°with the GL, in projection on that coordinate, or on anyseries of surfaces, forms, or…
Shades and shadows · Geometry, Descriptive
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