Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 420
Vui. Hi.—Automatic bi)octios>coije (Giubbs iorni). There is another arrangement which is very simple,in which we get the condition of minimum deviation bymerely mounting the prisms on a spring, and then … Fig. 175.—Automatic Spectroscope (Browuings form). moving the spring with the telescope, in the same way as the telescope moves the other automatic arrangement. For some observations, especially solar observations. 398 STAR(JAZI\(; : IAST AND PRESENT. [nnoK VI. ill which tlic liglit is very…
Astronomy · Telescopes
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