The Chemistry of the Sun

absorption Ångström appear atomic weight band barium blue line bright lines Bunsen Bunsen burner calcium carbon chemical elements chemistry chromosphere coincident colour complex considerable continuous spectrum dark lines diagram dissociation eclipse electric elementary bodies employed exist experiments F line fact flame fluted spectra Fraunhofer lines give green hydrogen lines hypothesis impurity incandescent increased inquiry intensity iron lines Kirchhoff layer light lines at w.l. lines seen lithium longest lines magnesium manganese metallic method molecular groupings molecules nickel number of lines oxygen pass phenomena Phil photographs photosphere poles prism Proc produced prominences rays referred refrangible region represented result reversed short lines slit sodium solar atmosphere solar lines solar prominences solar spectrum spark spectra spectroscope spectrum of iron spots stars strontium substances sun-spot sun's atmosphere telescope temperature terrestrial Thalén thickness tube vapour densities vibrations violet wave-length widened widened lines yellow