Spectrum Analysis -- Six Lectures

absorption analysis apparatus appear Appendix atmosphere bands become blue bodies bright lines carbon cause chemical coincidence colour comet compared comparison compound consists contains continuous corresponding dark lines detected determined diagram direction distance distinct double drawing earth effect electric elements emitted employed Erbium examination exhibits existence experiments fact Fe Fe Fe fixed flame give given green heat Huggins hydrogen important inch increased intensity interesting iron Kirchhoff Lecture less light lithium luminous matter means measures metals method motion nebula nitrogen notice observed obtained pass Phil placed PLATE portion position present prism probably produced quantity rays reference reflected refrangible relative represented salt scale seen Series similar Sirius slit sodium solar spectrum spark spectra spectroscope stars strontium substance taken telescope temperature tube vapour visible wire yellow