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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 47

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 47 — 27 VANISHING-POINT OF HORIZONTAL LINES. PROBLEM III. TO FIND THE VANISHING-POINT OF A GIVEN HORIZONTAL LINE. B … T Fig. 9. Let a b, Fig. 9., be the given line. From T, the station-point, draw tv parallel to A B, cutting the sight-line in v. v is the Vanishing-point required.* * The student will observe, in practice, that, his paper lying flat on the table, he has only to draw the line t v on its horizontal…

Perspective

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