Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 451
Fig. 193.—Solar Spectroscope (Brownings form). test the lines; whether any line of Sirius, for instance,is due to the vapour of magnesium, as Kirchhoff testedwhether any line in the sunlight was referable to iron orthe other vapours which he subsequently studied. … Fig. 191.—Solar Spectroscope (Grubbs form). These are shown in Fig. 195, e is a reflecting prism,and F is another movable reflector to reflect the light CHAP. XXIX.] THE CHEMISTRY OF THE STARS. 429 from a spark passed between two wires of the metalto be compared, and to tlirow it on the prism, which
Astronomy · Telescopes
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