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Proserpina ; also, Ariadne florentina ; The opening of the Crystal Palace ; St. Mark's rest ; Lectures on art ; The elements of perspective (1890)

Ruskin, John, 1819-1900, Ruskin, John, 1819-1900. Ariadne Florentina, Ruskin, John, 1819-1900. Opening of the Crystal Palace, Ruskin, John, 1819-1900. St. Mark's rest, Ruskin, John, 1819-1900. Lectures on art, Ruskin, John, 1819-1900. Elements of perspective · Boston : Aldine Book Pub. · leaf 846

An illustration from Proserpina ; also, Ariadne florentina ; The opening of the Crystal Palace ; St. Mark's rest ; Lectures on art ; The elements of perspective, 1890, leaf 846
m b and c (Fig. 22.) draw b v', c v, cutting each other in d. Then a b c d is the square required. COROLLARY I. It is obvious that any rectangle in a horizontal plane may be drawn by this problem, merely making a b', on the meas- uring-line, Fig. 20., equal to the sight-magnitude of one of its… … will bisect the sides of Fig. 22. the square, so that a g is the perspective representation of half the side a b ; a e is half a c / c h is half c d ; and bf is half b d. COROLLARY III. Since a b c d, Fig. 20., is a square, b a c is a right angle ; and as t v is parallel to a b, and t v' to a c, v'…

Botany · Flowers · Aesthetics · Perspective

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