XX. Flame spectra at high temperatures.— Part II. The spectrum of metallic manganese, of alloys of manganese, and of compounds containing that element

Abstract

The spectrum of manganese obtained in various ways has been the subject of much investigation. Huggins, Thalén, and Lecocq de Boisbaudran have studied the spark spectra of manganese compounds; Ångström, Thalén, Cornu, Lockyer, also Liveing and Dewar, the arc spectrum; Simmler, von Lichtenfels, Lecocq de Boisbaudran and Lockyer have investigated the flame spectra, while Marshall Watts has given us most accurate measurements of the wave-lengths of lines and bands observed in the spark and oxyhydrogen flame spectra of spiegel-eisen, manganese dioxide, and other compounds of this metal. An account of the spectrum of manganese obtained by the oxyhydrogen flame was prepared for insertion in Part I. of this research, but it was omitted for the reason that when investigating the spectrum of the Bessemer flame, I found it necessary to compare the spectrum of elementary manganese under different conditions with that of its oxide. Comparative experiments were made with various alloys containing manganese, and with compounds of that substance ignited in the oxyhydrogen flame.