The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 366
study of his system of perspective. PRELIMINARY PROPOSITIONS. Proposition 1.—The size of the image in the eye is proportional to the sizeof the picture, divided by the distance of the pictine. It has already been proved that the size of the image pr is proportional tothe size of the object ac… … But ym is constant, therefore the image j!;r varies, as ocz, the picture di-rectly, but as ,rv, the distance of the picture inversely, which relation is thesame as that abeady sliown to exist between the image and the original ob-ject ; therefore, if the representation he drawn, as here supposed,…
Architecture · Civil engineering · Science
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