Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 640
illustrated by fig. 604. The rays proceeding from an externalobject AB. and entering by the aperture O on one side, form on the sideopposite an image of the object ba in its natural colours, but of reduceddimensions, and in an inverted position. See also article 515. Porta, a Neapolitan physician,… … 615. Camera lucida.—The camera lucida is a small instrument depend-ing on internal reflection, and serves for taking an outline of any object. Itwas invented by Wollaston in 1804. It consists of a small four-sided glassprism, of which fig. 605 gives a section perpendicular to the edges. A is aright…
Physics
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