[en] Radial velocity and intensity measurements are presented for the strongest emission lines observed during four nights of continuous observation of Sco X-1. In general, the observations are consistent with a model in which the emission spectrum originates from an accretion disk surrounding the X-ray source. Some of the observations do not fit this simple model, but lack of phase overlap in the observations precludes further interpretation. A value of iapprox. =30degree and probable masses of M/sub x/approx. =1.3M/sub sun/ and M₂approx. =1M/sub sun/ are inferred from the observations