Ultraviolet Absorption Spectra of Some Early-Type Stars

Measures of wave length, estimates of intensity, and identifications are given for absorption lines in the ultraviolet spectra of two 0-type stars and six stars of types Bo to B2. The region investigated is between A 3050 and X 3400, results in some cases being added as far as X 3650. Especially prominent elements are 0 ii, 0 iii, Si in, Si iv, S ui, S iv, Ne ii, He i, He ii, and N n. A list of the interstellar lines observed in the spectrum of 55 Cygni is also given