Nature . a sun-spot as compared with the generalspectrum, showing that certain metallic lines (sodium andcalcium in this instance) are widened. The darker portionrepresents the spectrum of the spot. assumes that in the reversing layers of the sun and starsvarious degrees of celestial dissociation are at work,which dissociation prevents the coming together of theatoms which, at the temperature of the earth and at allartificial temperatures yet attained here, compose themetals, the metalloids, and compounds. Subsequently in a private letter to M. Dumas, who tookthe keenest interest in my solar w
Nature . a sun-spot as compared with the generalspectrum, showing that certain metallic lines (sodium andcalcium in this instance) are widened. The darker portionrepresents the spectrum of the spot. assumes that in the reversing layers of the sun and starsvarious degrees of celestial dissociation are at work,which dissociation prevents the coming together of theatoms which, at the temperature of the earth and at allartificial temperatures yet attained here, compose themetals, the metalloids, and compounds. Subsequently in a private letter to M. Dumas, who tookthe keenest interest in my solar work, I wrote, II sembleque plus une dtoile est chaude plus son spectre estsimple. 1 Phil. Trans.^ vol. clxiv. part 2, p. 49J. 538 jVA ture I also pointed out the close relation of hyrirojjen tocalcium, magnesium, and other metals (it was on this [Aiiai, 6, 1899 Academy of Sciences was thus concluded by : / .7 0^7 V ARC ANGSTROM SPARK THALEN 20 IFREQUENCIES 59 SUN SPOTS ,J KENSINGTON I FREQUENCIES. ground that I had named the substance which gave U. I En resume, quand je soutenais devant TAcaddmiewhich always varied with hydroycn, helium 1, and the | que les elements de Lavoisier devaient ctre considdres,
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