Light-curves of the five eclipsing binaries vV Orionis, Rz Cassiopeiae, U Ophiuchi, WW Aurigae, and TV Cassiopeiae have been completed at the Washburn Observatory. These photoelectric measures were made mostly during 1948 and 1949, with the 1P21 photomultiplier, which has an effective wave length of 4600 A. The computations were made at the Massachusetts Institute of Technology. Kopal's method was used, the numerical computations being performed with electric desk calculators. The stars U Ophiuchi and WW Aurigae are double-line binaries in which Petrie's line-intensity ratios aid in giving definite solutions from partial eclipses. The brighter star is the larger in each case. TV Cassiopeiae is less certain because of poor secondary lines but its fainter component appears also to be the smaller of the two. Rz Cassiopeiae loses over 80 per cent of its light at primary minimum, when the fainter, larger star is in front; but a search by Struve failed to detect the secondary spectrum. vV Orionis is a case of total and annular eclipses of a single-line binary. Because of the shallow eclipses and the uncertainty of the measures, it was not possible to determine the darkening coefficients from the investigations.