Catalogue of Spectra : Laboratory notebooks / W.N. Hartley, Dublin. 1895-1907. [Vol.1 (covering 1 to 71) is titled 'Researches on Bessemer Flame Spectra'; vols.2 to 4 (covering 77 to 164, 165 to 296 and 297 to 391) are titled 'Researches in Spectrum Analysis. Oxyhydrogen Flame Spectra of various minerals' and metallic substances showing their composition. Letter, found in vol.1, has inv. no. 1993-375 (MS 1480)]