Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 234
rs in front of the concave mir-ror may be either larger or smaller than the object itself,depending upon the position of the object relative to themirror and the observer. It is inverted, and is formed in the air. A candle placedbetween the center of curvature of the mirror and the prin-cipal focus… … Concave Mirror, Phantom Bouquet. (either natural or artificial) in an inverted position, behind ashield of some sort, and projecting its image into the airby means of a concave mirror. A magnifying hand glassanswers the purpose, if of the right focal length, and a fewbooks may serve as a shield.…
Physics · Lantern projection · Electric apparatus and appliances
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