Volumetric emission coeffs. of pool fires are detd. from photograms and IR radiance distributions. The volumetric emission coeffs. of a hexane [110-54-3] pool fire were calcd. A simplified model, based on the assumptions of the optically thin limit and nonuniformities of temp. and species concns. is used to compute the axisym. distribution of the volumetric emission coeffs. from sampling probe measurements of stable species and temps.