Higgins1 has reported the successful solution of renal calculi in human beings. The method employed was the administration of an acid ash diet supplemented by vitamins A, B, D, G and E from several sources. This work was based on the earlier reports of many investigators2 and also on his own animal experimentation.3
The preliminary reports published by Higgins were so promising and of such clinical importance that a parallel series of patients was treated by the method he outlined. The medical aspects as well as the diet supervision and the urinary pH measurements were controlled in the nutrition clinic of the dispensary. A representative of the surgical service cooperated, selected the cases and performed the necessary genitourinary procedures.
The diet as employed in this work differed somewhat in detail but not in principle from that used by Higgins. This was necessitated by the fact that the