Spectrum Analysis: Six Lectures, Delivered in 1868, Before the Society of Apothecaries of London

absorption analysis apparatus appear APPENDIX atmosphere bands become blue bodies bright lines carbon caused chemical coincident colour comet compared compound consists contains continuous corresponding dark lines detected determined direction distance distinct drawing earth effect electric elements emitted employed examined exhibits existence experiments fact Fe Fe Fe fixed flame gases give given green heated Huggins hydrogen important increase indicate intensity interesting iron Kirchhoff Lecture less light lithium luminous magnesium matter means measures metals method motion nature nebula nitrogen noticed object observed obtained pass Phil placed PLATE portion position present prism probably produced prominences quantity rays reference refrangible remarkable represented salts scale seen Series similar Sirius slit sodium solar spectrum spark spectra spectroscope stars substance sun's telescope temperature tube vapour visible yellow