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The diffusion coefficient of water in organic liquids close to infinite dilution and at 25°C was measured using the diaphragm cell method in the following solvents, for which measurements have not previously been made: n-butyl acetate, n-butyric acid, toluene, methylene chloride, 1,1,1-trichloroethane, trichloroethylene, 1,1,2,2tetrachloroethane, 2-bromo-2-chloro-l ,1,1-trifluoroethane, nitrobenzene, and pyridine. The first two liquids fit the Olander equation and the next seven the original Wilke-Chang equation, while the last is intermediate between the two. For pyridine, the effect of dissolved nitrogen has been found to reduce the diffusion coefficient of water by about 30%.