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 312
est each other can be made tooverlap and melt into one, in whichobjects will stand out just as whenseen through the stereoscope. 7. Place a scrap of colored paper 1 EYES 303 EYES or cloth on a gray ground, and looksteadily at it for about a minute.Snatch the scrap away and in itsplace will be seen… … Fig-. -Experiment 7. pulling the paper away, the eye bedirected to the ceiling, the spot willbe seen there. These spots, whichare often called ghosts, are causedby the action of light on the retina.The accompanying figure (Fig. i) isa good one to experiment on. Lookat it steadily for some time and…
Games · Sports · Card games
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