Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 415
get thisaj^parently ridiculously small extension—used such anarrow slit as we have mentioned, and he found that whenhe examined the light of the sun with a prism before theeye, he got results of which Newton had never dreamt. Dr. Wollaston not only found the light of the sundiffering in… … CHAP. XXVII.] THE 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…
Astronomy · Telescopes
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