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

absorption acid analysis appear APPENDIX atmosphere bands becomes blue bodies bright lines carbon caused chemical chloride coincident colour comet compared compound consists contains continuous corresponding dark lines detected determined direction distance distinct drawing effect electric elements emitted employed examined exhibits existence experiments fact Fe Fe Fe fixed flame gases give given green heated Huggins hydrogen important increase intensity interesting iron Kirchhoff lecture less light lithium luminous magnesium matter means measured metals method motion nature nebulæ nitrogen noticed observed obtained occur pass Phil placed plate portion position potassium present prism probably produced prominences quantity rays reaction reference refracting refrangible salts scale seen Series slit sodium solar spectrum spark spectra spectroscope stars strontium substance telescope temperature tube vapour violet visible whilst wire yellow