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 336
, as in themicroscope. Fig. 251, and appears to the eye at E. 314. The Terrestrial Telescope or Spy-glass. — As theAstronomical Telescope, last described, presents objects to theeye inverted^ it is unsuited for viewing terrestrial objects;accordingly, for this purpose, two additional lenses are… … restrial telescope will be readily understood by Fig. 256, where Explain Fig. 255. Why is the Astronomical Telescope unsuited for viewingterrestrial objects? How is this remedied, and the object made to appearupright ? Explain the course of the rays of light, and the manner in whichthe image of the…
Physics
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