Spectrum Analysis -- Six Lectures

absorption analysis apparatus appear Appendix atmosphere bands become blue bodies bright lines carbon cause chemical chloride 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 heated Huggins hydrogen important inch increased intensity interesting iron Kirchhoff lecture less light lithium luminous matter means measures metals motion nebulæ nitrogen notice observed obtained occur pass Phil placed PLATE portion position potassium present prism probably produced quantity rays reference reflected refrangible remarkable represented salts scale seen Series similar slit sodium solar spectrum spark spectra spectroscope stars strontium substances taken telescope temperature tube vapour visible wire yellow