The Spectrum of γ Cassiopeiae in the Photographic Region

The double emission lines began to narrow in November, 1936, and the spectrum became entirely one of single, narrow emission lines during the early summer of 1937, All lines became much stronger in the single-line stage. The spectrum was remarkable for the great number of lines of ionized iron, while the Balmer series was measured from H$ to H32. One Ca iii line was identified. Other elements found are Al n, Ca ii, Cr ii, He i, Mg ii, Ni ii, Si ii, and Ti ii, while A ii, Cr i, Mg i, Mn i, S ii, and Sc ii are identified provisionally. Previous to and after the single-line stage which ended in November, 1937, the emission lines were divided by an absorption line. The intensity ratios of the two emis- sion components of a line varied with time