57 NATURE | April 20, 1882 
simplification. The hottest part of the Sun has given us | common. Passing then from the iron lines in the spots 
the fewest lines. Next. there is not a single line in | to the iron lines in the storms, we pass from one spectrum 
Fic. r.—The Eclipsed Sun in 1878, from the photographs. 
to another, and the two spectra are as distinct from one | chlorine or any other substance you please. I have ven- 
another as the spectrum of magnesium from that of | tured to put in red ink two other lines, because Tacchini 
Fic. 2.—The Eclipsed Sun, August 29, 1867, as observed by Grosch at Colchagua, near Santiago. 
feind that about January 1873 the spectrum suddenly | was no Solar rain, and we got the minimum of inter- 
chenged when the Sun was absolutely quiescent. Ther: | ference with local temperature. The iron lines van- 
