The Boston school compendium of natural and experimental philosophy .. (1837)
Parker, Richard Green, 1798-1869 · Boston : Marsh, Capen & Lyon · leaf 154
; in thefocus of which the object is placed, and through whichit is viewed. By means of a microscope the rays of light from an object arecaused to diverge less; so that when they enter the pupil of theeye they fall parallel on the crystalline lens, by which they are re-fracted to a focus on the… … fall parallel on the crystalline lens, by which they are refracted toa focus on the retina R R; and the image is thus magnified, becausethe divergent rays are collected by the lens and carried to the retina.Those lenses or microscopes which have the shortest focus, havethe greatest magnifying power…
Physics
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