St. Mark's rest : the history of Venice written for the help of the few travellers who still care for her monuments (1885)
Ruskin, John, 1819-1900 · New York : Lovell · leaf 357
to the sight-magnitudeof A B and join r m ; the line r m will cut a v in b. And thisis in practice generally the most convenient way of obtainingthe length of a b. * The demonstration is in Appendix 11. Aiticle II. p. 90. TUE ELEMENTS OF PERSPECTIVE. COROLLARY IV. Removing from the preceding figure… … Fig. 14. Til en as X r is parallel to m n, and a r is equal to a x, v nmust, by similar triangles, be equal to v m (equal to v t iuFig. 13.). . Therefore, on whichever side of v we measure the distanceV T, so as to obtain either the point m, or the jjoint n, if wemeasure the sight-magnitude a r or…
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