Lange, David C. (David Christoph) · New York, John Wiley & sons, inc.; [etc., etc.] · leaf 117
x^J- is the highestpoint of !tliade … RPINCIPLES OF SHADES AXl) 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 sUce cut from the object by the planeof light is a great circle on which are the h ghest and lowestpoints of Shade and…
Shades and shadows · Geometry, Descriptive
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