Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 171
—This instrument, known alsoby various other names, stereapticon, for instance, requiresa powerful source of light, such as a large kerosene-flame,or some form of calcium-light A (Fig. 115), in which acylinder of quicklime is heated by a flame formed by burn-ing together oxygen ami coal-gas, or.… … Fig. 115. image of which is to be exhibited. This slide is pushedinto the opening (7, a little outside the focus of a smallerconvex lens or a pair of such lenses, D, and a greatlyenlarged real image of the slide is thrown upon the screen. The throwing of large images upon a screen is called…
Physics
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![An illustration from Catalogue des monuments et inscriptions de l'Égypte antique / publié sous les auspices de S.A. Abbas II Helmi par la direction générale du Service des antiquités [de l'Égypte] ; par J. de Morgan, U. Bouriant, G. Legrain, G. Jéquier, A. Barsanti (1894)](https://img.insideoutlibrary.com/img/200/ia-cataloguedesmonu21egyp-160-264@90.webp)