We have examined rocket measurements of O I 989-, 1304-, 1356-¿ and N2 Lyman-Birge-Hopfield band emissions in the mid-latitude dayglow reported by Gentieu et al. (1979) and Eastes et al. (1985). MSIS-83 atomic oxygen densities, the 1304- and 1356-¿ excitation cross sections of Zipf and Erdman (1985), and Solar Mesosphere Explorer solar 1304-¿ irradiance measurements are consistent with the observed O I and N2 emission intensities. Atmosphere Explorer E measurements of the solar EUV irradiance near solar maximum are consistent with the 1980 rocket airglow data (F10.7=213). However, the solar EUV irradiance required to explain the 1978 airglow data (F10.7=106) is a factor of 1.5 larger than indicated by AE-E. Enhancement of the 1304-¿ excitation cross section due to radiative entrapment of cascade-feeding photons is much less than the factor of 2 predicted by the cascade model of Julienne and Davis (1976). The 3s'3D¿ direct excitation cross section of Vaughan and Doering (1987) is consistent with the 989-¿ airglow data and leads to an inferred total branching ratio of 1--2¿10-4 for transitions other than 989 ¿ from 3s'3D¿, in agreement with the value for the 1173-¿ branch measured in laboratory experiments. ¿ American Geophysical Union 1988