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 308
sky, both in inverted and direct positions. Thesephenomena may be sometimes imitated by looking at objects over the surfaceof any heated body, as the boiler of a locomotive, when the objects will appearraised, or perhaps inverted. What is meant by the limiting angle ? What is said of the reflection… … pass through them. Fig. 240 presents sectional views of those commonly employ-ed for optical pur-poses. The double-convex lens, A, hastwo convex sur-faces ; the plane-convex^ B, has oneconvex, and oneplane surface; themeniscus^ C, has a convex and a concave surface, the curvatureof the former…
Physics
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