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Scientific American, Vol. 57, No. 13 (1887) (1887)

leaf 7

An illustration from Scientific American, Vol. 57, No. 13 (1887), 1887, leaf 7
rt over the center of the lap would not be cut, and a G., and of the widow of Alvan Clark, the father. back of it a plane mirror, silvered on its anterior face, prominence would soon be created there. The iron The grounds are very prettily kept as a luxuriant is placed. The lamp and prism are so… … spiration as he dark room. If the lens is perfect, the treads the truly TESTING VISUAL OBJECTIVES. field is of uniform classic spot that: brightness, pre- has furnished as- grains, owing to their metallic nature, are very tough, tronomy with its most efficient weapons. The story senting, however,…

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