Phosphoric acid often relieves the thirst of this malady, and has been recommended by Latham, Paris, Watson, and other practical physicians; on the other hand, the experiments of Pavy (already quoted) indicate that much of it would be injurious, and Griesinger not only states that it does not lessen the excretion of sugar, but in one case supposes it actually to have caused the malady.

Against this, we might set a case recorded by Thornley, in which the thirst was relieved and the patient apparently cured (Medical Press, May 20, 1868); but, without being in a position to dogmatize on the matter, I may say that I have known the acid on several occasions to relieve symp-toms and diminish the amount of sugar in the urine.