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 352
tbeneath or above the station-point, c d is to d t as c n is tod t ; in which case the point c coincides with the point c,and the line a h is vertical. * The deiuoiibtratiou is iu Appt.ndix II. Article L VANISHING-POINT OF HORIZONTAL PLANE. 23 Therefore every vertical line in a picture is, or may… … Fig. 9. Let a b, Fig. 9., be the given line. From T, the station-point, draw t v parallel to a b, cuttingthe sight-line in v. V is the Vanishing-point required, f * The reflection in water of any luminous point or isolated object(such a.s the sun or moon) is therefore, in perspective, a vertical…
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