Abstract
The spectrophotometry of seven dwarf novae was obtained from λλ3800-5200 Å; three objects were observed during outburst and four near minimum. The Balmer lines in emission and absorption have similar widths (∼ 4540 km s-1) RU Peg, SS Cyg and AB Dra show weak C II λ4267 in emission. EM Cyg shows strong He II λ4686 in emission during outburst. CY Lyr and UU Aql have, near maximum, equivalent widths comparable with those of a B3 III star. The emission line ratios from optically thin steady state accretion disc models are lower than the observed values. The latter are ∼ 3 times greater than Case B recombination values. The observed He I/H I flux ratios are consistent with the predicted values by Williams and Ferguson (1982) for models with high helium abundance.
