Studies on the Mechanism of Formation of Renal Calculi. II.

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Abstract
In extension of a previous report urines from normal subjects and chronic stone formers were equilibrated with secondary calcium phosphate, tricalcium phosphate, and calcium oxalate. The resulting changes in the concentrations of Ca, Mg, PO4, oxalate, urate, and citrate were determined. This treatment in most cases resulted in a decrease in the constituents studied; secondary calcium phosphate, however, caused an increase in Ca upon equilibration with tricalcium phosphate.