Abstract
DR. EDRIDGE GREEN'S explanation on p. 375 of NATURE of November 18 does not go quite far enough. It is true that a picture in correct drawing and perspective will be correct only for one eye, but the eye must be situated at a certain point which is geometrically defined by the elementary rules of perspective. A photograph taken by a pin-hole camera or with any good lens is in true perspective. It should be viewed at the same angle as that with which it was taken; in other words, it should be viewed from a distance equal to that of the pin-hole (or a certain point in the lens combination) from the plate.
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TROTTER, A. The Stereoscopic Appearance of Certain Pictures. Nature 106, 503 (1920). https://doi.org/10.1038/106503a0
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DOI: https://doi.org/10.1038/106503a0
