Light scattering from boron trioxide has been studied as a function of temperature in the melt near the glass transformation temperature and in the solid. Both polarized and depolarized spectra were obtained. At all temperatures (20–516°C) the scattering consists of a polarized contribution associated with density fluctuations and a depolarized component presumably connected with the anisotropic nature of the B2O3glass network. Quantitative results are presented confirming that the polarized scattering from density fluctuations in the solid is determined by the equilibrium compressibility of the melt at the fictive temperature. It is shown that the anisotropic scattering also appears to be ``frozen‐in'' at the fictive temperature.