Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 416
CHEMISTRY OF THE STARS. 393 In the year 1814 Fraunhofer examined the spectrumby means of the telescope of a theodolite, directing ittowards a distant slit, with a prism interposed. Inthis manner he observed and mapped 576 lines, theappearance of the spectrum to him. being representedin Fig. 170.… … Fig. 171.—Students Spectroscope. who attempted to attack the problem. The differencebetween the simple prism and slit which Newton,Wollaston, and Fraunhofer used to map these lines, andthe modern spectroscope, as used with or without thetelescope, is due to a suggestion of Mr. Simms in 1830.Let us…
Astronomy · Telescopes
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
