Spectroscopic Observations of V Canum Venaticorum

Thirty spectrograms of the irregular variable V Canum Venaticorum have been obtained, mostly in 1935 and 1936, at various phases of the light-change. Radial velocities-The velocity ranges for emission and absorption are 5.5 and 8.i km/sec, respectively. The displacement of the emission lines toward the violet with respect to the absorption lines averages 6.3 km/sec. Spectral changes-The spectrum changes very little during the period. Hydrogen emission lines persist throughout, but are somewhat weaker at minimum. H~y and Ho are nearly equal in intensity and stronger than ~ The spectral type varies from M4 to M6