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The elements of perspective : arranged for the use of schools and intended to be read in connexion with the first three books of Euclid (1859)

Ruskin, John, 1819-1900 · London : Smith, Elder · leaf 57

An illustration from The elements of perspective : arranged for the use of schools and intended to be read in connexion with the first three books of Euclid, 1859, leaf 57 — 37 GIVEN LINE IN HORIZONTAL PLANE. PROBLEM Y. TO DRAW A HORIZONTAL LINE, GIVEN IN POSITION AND MAGNITUDE, BV MEANS OF ITS SIGHT-MAGNITUDE AND DIVIDING- POINTS. B \A ^ M … Let ab (Fig. 16.) be tbe given line. Find tbe position of tbe point A in a. Find tbe vanishing-point v, and most convenient dividing-point m, of tbe line A b. Join a v. Through a draw a horizontal line a b' and make a b' equal to tbe sight-magnitude of A B. Join b' m, cutting a v in b. Then ab is…

Perspective

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