A consideration of the therapeutic doses generally used by South African doctors who avoid toxic effects during the treatment of schistosomiasis indicates that a permanent cure of the disease may be effected with either the potassium salt or the sodium salt of antimony tartrate within a month. A dose of 2 grains need never be exceeded with antimonium potassium tartrate in fresh solution as a maximum repeated dose. A total of 20 grains of this salt is a sufficient total dose; but the solutions of the drug should not be kept. The sodium salt of antimony tartrate was found less stable than the potassium of this compound.