Spectrum Analysis -- Six Lectures

absorption absorption spectrum acid Ångström apparatus appear Appendix bands barium blue bodies bright bands bright lines brightest Bunsen cæsium calcium carbon chemical Chemical Elements chloride coincidence colour comet compound contains continuous spectrum dark lines detected diagram didymium double line earth electric spark electrodes emitted employed examination existence eyepiece Fe Fe Fe fixed stars flame Fourth Series Fraunhofer Fraunhofer's gaseous gases give heat Huggins hydrogen line incandescent inch instrument intensity Kirchhoff Lecture lens light lithium luminous magnesium Major Tennant measures metallic lines micrometer motion nebula nitrogen object-glass observed obtained pass Phil placed PLATE platinum portion position potassium present prism Proc produced quantity rays refracting refrangible rubidium salt seen Sirius slit sodium sodium line solar atmosphere solar spectrum spectra spectroscope Spectrum Analysis stellar strontium substance sun's telescope temperature Thallium Trans tube vapour violet visible volatile wave-lengths whilst wire yellow