The American house carpenter: a treatise upon architecture, cornices and mouldings, framing, doors, windows and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 274
nation of the line of shadow. This is always,in architectural drawing, 45 degrees, both on the elevation and theplan; and the sun is supposed to be behind the spectator, andover his left shoulder. This can be illustrated by reference toFig. 304, in which A represents a horizontal plane, and B and… … Fig. 304. line, a b, is drawn at an angle of 45 degrees with the horizon, andthe hne, c b, at the same angle with the vertical plane, B. Theplane, B, being a rectangle, this makes the true direction of thesuns rays to be in a course parallel to d b; which direction hasbeen proved to be at an angle…
Carpentry · Architecture
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