Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 305
Diapbragm and Fine Adjustment. To the instrument as received from the manufacturer isapplied a home-made diaphragm, as shown at A, in Fig.294, and a fine adjustment, as shown at B C, in the same fig- FiG 295.
Physics · Lantern projection · Electric apparatus and appliances
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