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

absorbing absorption 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 double drawing earth electric elements emitted employed examined exhibits existence experiments fact Fe Fe Fe flame gases give given glass green heated Huggins hydrogen increased indicate intensity interesting iron Kirchhoff lecture less light lithium luminous maps matter means measures metals method motion nature nebula nitrogen noticed observed obtained occur oxide oxygen pass Phil placed plate portion position potassium present prism probably produced Professor prominences quantity rays reference refrangible remarkable salts scale seen shown similar slit sodium solar spectrum spark spectra spectroscope stars substance telescope temperature traces tube vapour violet visible whilst yellow