Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 76
eir lights and shades, from two differentpoints of view so selected as to give an effective Stereoscopic combination. t This combination may be made without the Stereoscope, by looking atthese figures with the axes of the eyes brought into convergence upon a some-what nearer point, so that A is… … away from it; whilst the combination of the lower pair, c, d (whichare identical with the upper, but are transferred to opposite sides),no less vividly brings to the mind the visual conception of a re-ceding Pyramid, still with the small square in the centre, but thefour sides sloping equally…
Microscopy · Biology
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