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The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies (1856)

Sprague, A. W. (Alfred White), 1821-1891 · Boston : Phillips, Sampson & Company · leaf 357

An illustration from The elements of natural philosophy : copiously illustrated by familiar experiments and containing descriptions of instruments, with directions for using : designed for the use of schools and academies, 1856, leaf 357
e dissolvinglanterns, where the DrummondLight (see § 334) is used forilluminating,instead of the slideS, a Dissolving Stop-Cock, Fig.270, is employed, for alternatelyletting on and closing off theUght. The cylinder of this is fixedupon the rear part of the stand,between the lanterns. The tubefrom… … 352 DISSOLVING VIEWS. With the lanterns and lights properly adjusted, let two slidersbe placed in the slits, one for instance representing a landscapeby day, and the other precisely the same landscape by night;and let the light through the nozzle which contains the land-scape by day be…

Physics

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