Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 303
iameter, having in one side 28o EXPERIMENTAL SCIENCE. a screw for displacing tiie water to render the lens more orless convex. A thin piece of glass is cemented to the lowerend of the tube, and the inside of the tube is blackened. Several bushings may be fitted to the upper end of thetube to reduce… … Water Lens Microscope Complete. glass, when the lens may be focused by turning the adjust-ing screw. The lens may be adjusted to magnify objectsplaced on the movable stage by rendering it less convex,thus increasing its focal length. Air bubbles forming on the upper surface of the glassmay be…
Physics · Lantern projection · Electric apparatus and appliances
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