We have reanalyzed the UVX measurements of the surface brightness of t
he diffuse ultraviolet background above \b\ = 40-degrees using the dus
t-scattering model of Onaka & Kodaira (1991), which explicitly takes i
nto account the variation of the source function with galactic longitu
de. The range of allowed values of interstellar grain albedo a, and sc
attering asymmetry parameter g, is considerably expanded over those of
a previous analysis. The new chi2 probability contours come close to,
but do not include, the values of a and g found for the interstellar
grains by Witt et al. (1992) using the Ultraviolet Imaging Telescope o
n the Astro-1 mission. If we hypothesize in addition to the dust-scatt
ered light an extragalactic component of 300 +/- 100 photons cm-2 s-1
sr-1 angstrom-1, attenuated by a cosecant b law, the new reduction of
the UVX data gives complete consistency with the Witt et al. determina
tion of the optical parameters of the grains in the ultraviolet.