Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 299
rated^by a w.der space than a a,; consequently,the eyes being each diected on the partsb. b will be wider apart, or will have a greater divergence than when looking ata. a ; and, as parts of the same object innature give the effect of greater or less dis-tance in proportion as they cause the eyesto… … assist the explanation ; here thearrows aresupposed to be combined, or stand overeach other ; the eyes (c d) being directedon the corresponding points (a. a) the vi-sual angle will be represented by a c d \and when directed on b. b. the angle willbe b c d; but b c d is a much, smaller an-gle than a…
Photography · Art and photography
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