The standard potentials at 25" of the Ag, AgI electrode in ethanol and ethanolwater mixtures, of the Ag, AgBr and Ag, Agl electrodes in acetone-water mixtures and one dioxane-water mixture and of the Ag, AgBr electrode in 100 % acetone have been determined by comparison with the known standard potentials of the Ag, AgCl electrode in these solvents.