The Boston school compendium of natural and experimental philosophy .. (1837)
Parker, Richard Green, 1798-1869 · Boston : Marsh, Capen & Lyon · leaf 150
the rays proceed out of a denser into a rarer medium, what occurs; 6. What isstated, in No. 6, with regard to concave surfaces ! 7. What is said of divergingrays? 8. What is said of converging rays .» Of what are the above eight prin-ciples the necessary consequence ? What is the reason that so… … persons. Convex glasses are used when the eye is tooflat, and concave glasses when it is too round.* 363. The eye is composed of a number of coats, orcoverings, within which are enclosed a lens, and cer-tain humors, in the shape, and performing the office ofconvex lenses. 364. The different parts…
Physics
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