The young folk's cyclopædia of games and sports ; (1899)
Champlin, John Denison, 1834-1915, Bostwick, Arthur Elmore, 1860-1942, joint author · New York, H. Holt and company · leaf 134
With a hole about -^^ of an inch indiameter the picture will be quitebright, but so blurred that it is hard totell different objects from each other.The box should not be more thanan inch deep, as the farther the backis from the pinhole, the less distinctthe picture will be. In the evening,such a… … Fig. 2. resent rays of light from differentparts of an object passing throughthe pinhole and striking the back ofthe box. When the cover is takenfrom the box, rays from all parts ofthe object strike every part of thebox at once and are mixed together,hence there is no picture, but only awhite blur.…
Games · Sports · Card games
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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