A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)
Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 229
n.—This instrument, known alsoby various other names—stereopticon, for instance—requiresa powerful source of light, such as a large kerosene-flame,or some form of calcium-light A (Fig. 145), in which acylinder of quicklime is heated by a flame farmed by burn-ing together oxygen and coal-gas, or,… … FIG. 145. image of which is to be exhibited. This slide is pushedinto the opening C, 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…
Physics
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