The arc spectrum of scandium and its relation to celestial spectra.

Abstract

Very little has been published regarding the spectrum of this rare element. The records of Thalen, and Exner and Hasehek, are the only ones previously given, the former observer confining his attention to the spark spectrum, whereas Exner and Haschek have recorded the lines under both arc and spark conditions. In the latter lists, however, no lines are given in the region less refrangible than λ 4744.0.