Spectrum Analysis Six Lectures, Delivered in 1868, Before the Society of Apothecaries of London by Henry E. Roscoe

absorption acid alkaline Ångström apparatus appear APPENDIX bands barium blue bodies bright bands bright lines Bunsen cæsium calcium carbon Chemical Elements chemically active chloride chromosphere coincident colour comet compound contains continuous spectrum dark lines detected diagram didymium electric spark emitted examined experiments F line Fe Fe flame Fourth Series Fraunhofer Fraunhofer's Fraunhofer's lines gaseous gases give green heated Huggins hydrochloric acid hydrogen lines incandescent instrument intensity Kirchhoff lecture lens light lithium Lockyer luminous magnesium metallic lines millimetre motion nebula nitrogen object-glass observed obtained pass peculiar Phil placed PLATE platinum portion position potassium present prism Proc produced prominences quantity rays reaction refracting refrangible rubidium salts scale seen Sirius slit sodium sodium line solar atmosphere solar lines SOLAR PROMINENCES solar spectrum spectra spectroscope spectrum analysis stars strontium substance sun's telescope temperature thallium tube vapour violet visible wave-length whilst wire yellow