Lange, David C. (David Christoph) · New York : John Wiley & Sons ; London : Chapman & Hall · leaf 115
x^^x^^ is the highestpoint of shade • ^- •^- B L 1 C „ FIG. 58 … PLAN A-A F O B L f C m RPINCIPLES OF SHADES AND SHADOWS 105 and Shadow. (Art. 37.) These points are the highest andlowest points in the shade-hne or shadow-hnes of the Sphereor Scotia, because the shce cut from the object by the planeof hght is a great circle on which are the h ghest and…
Shades and shadows · Geometry, Descriptive
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