Page 484 - 89 history of astronomy_opt

and in the same eclipse (1868) an orange
line was noticed which was afterwards found
to lie close to the two components of the D
line. It did not correspond with any known
terrestrial element, and the unknown ele-
ment was called ”helium.” It was not until
1895 that Sir William Ramsay found this
element as a gas in the mineral cleavite.
The spectrum of the corona is partly
484