Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 237
image of the same apparent magnitude aseach of the component pictures. The accompanying figures are two cir-cles at different distances from the eyes,their centres in the same perpendicular,forming the outline of the frustum of a cone.If a cone is placed before the observer withits apex towards… … If we select any building such as agateway and examine the conditions asviewed first by the right and then with theleft eye, we shall find that two such imagesas the following will be produced.* Such images as these placed upon thepanels of the stereoscope, and viewed inthe mirrors, give rise to an…
Photography · Art and photography
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