Warren, Samuel Edward, 1831-1909. [from old catalog] · New York, J. Wiley & sons · leaf 42
two points of it, while it may con-tain the whole of a straight line. But we have seen that theshadow of a straight line is practically determined by the sha-dows of two of* its points. Now the shadow of a point is foundin the same way, whether that point be on a straight line or ona curve ; hence… … 13 PI. Ill W B ^
Shades and shadows
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
