On Spectrum Analysis as Applied to Microscopical Observation: the Subject of a Lecture Delivered at the South London Microscopical and Natural History Club, April 9, 1872 : With Appendix, &C., Six Plates of Absorption Spectra by the Author

On Spectrum Analysis as Applied to Microscopical Observation: the Subject of a Lecture Delivered at the South London Microscopical and Natural History Club, April 9, 1872 : With Appendix, &C., Six Plates of Absorption Spectra by the Author