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Scientific American, Vol. 42, No. 24 (1880) (1880)

leaf 4

An illustration from Scientific American, Vol. 42, No. 24 (1880), 1880, leaf 4
sure to enter brilliancy of the binocular telescope is doubly as greatas that as with two. In looking farther into the matter it turned her protest by inflicting the common penalty. of a single telescope of like aperture and focal length, for we The far-off problems of space, and many of the nearer… … alone demonstrates that two eyes double feet. As it is mounted on a tripod it can be the illumination of all images of external SECTION OF BINOCULAR COMET SEEKER. objects formed on the retina; again there- stationed among the grasses and having fore it is proved that the binocular tele- universal…

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