Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 325
beraised or lowered, or tilted at any required angle. 302 EXPERIMENTAL SCIENCE. The position of the cell relative to the source of light isshown at i. The cell and the source of light or the mirrorshould be arranged so that the image of the flame used forillumination or the broad light of the sky… … Mount of Newtons Rings for the Microscope. somewhat varied by turning the cell at different angles, andmoving the source of light accordingly. The concavemirror is used to concentrate the light; but, of course, acondenser may be used instead, or, if the Hght is strongenough, the beam ma)^ be…
Physics · Lantern projection · Electric apparatus and appliances
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