The Chemistry of the Sun

absorption Ångström appearance atomic bands barium blue line bright lines Bunsen Bunsen burner calcium carbon chemical elements chemistry chromosphere cobalt coincident colour complex compound considerable continuous spectrum corona crucible dark lines density dissociation eclipse electric elementary bodies employed exist experiments fact faculæ flame fluted Fraunhofer lines give hydrogen hydrogen lines hypothesis impurity incandescent increased intensity iron lines Kirchhoff latitude layer light lines seen lithium longest lines magnesium manganese method molecular molecules nickel number of lines obtained pass phenomena Phil photographs photosphere poles prism Proc produced radiation rays referred refrangible region result reversed short lines slit sodium solar atmosphere solar lines solar prominences solar spectrum spark spectra spectroscope spectrum of iron spots and prominences stars strontium substances sun-spot sun's atmosphere telescope temperature terrestrial Thalen thickness titanium tube vapour velocity vibrations violet visible wave-length widened widened lines yellow