The extreme ultraviolet telescope on the Apollo--Soyuz mission observed the far UV nightglow in the 1350--1700 A band from an altitude of 225 km at solar minimum in July 1975. Looking down when the spacecraft was clear of the auroral zones, a faint glow well above instrumental background and varying smoothly with solar zenith angle is recorded. The minimum intensity at solar zenith angles >150¿ is ≈100 photons cm-2 s-1 A-1 (≈0.2 Rayleighs) in this passband and is most probably due to N2 Lyman-Birge-Hopfield band emission. Looking up, the airglow, if it exists, is very difficult to disentangle from the astronomical background, except in one case where an obvious equatorial enhancement of ≈ 1000 photons cm-2 s-1 A-1 is observed. The measured intensities looking down are in all cases substantially less than those reported by Huffman et al. [1980> and consistent with upper limits established in 1968 by Prinz and Meier [1971>. Thus the enhancements observed by Huffman et al. must be due either to an impulsive short-lived source or to a secular increase since 1975 of one or more of the parameters affecting the unknown emission mechanism.