on the Effects of Magnesia. ss5 



Under this treatment the symptoms produced by the muriatic 

 acid subsided ; but the appearance of the urine was nrot at first 

 improved. 



On the 20th, the film of triple phosphate formerly con- 

 stantly observed in the urine began to decrease, but the white 

 sand remained as abundant as before ; he was therefore directed 

 to take twenty grains of citric acid twice a day, and to continue 

 the use of acid drink, as formerly. 



The additional acid at first disagreed with the bowels ; but 

 this effect soon ceased, and the sediment was only observed 

 in the urine voided in the morning ; he therefore took another 

 dose of the acid every night. This plan was pursued with 

 little intermission until the beginning of December: the de- 

 position of the phosphates gradually ceased, and he remained 

 in perfect health until the middle of May, 1812, when after 

 violent exercise and taking more wine than usual, the white 

 sand again made its appearance in great abundance ; his sto- 

 mach became extremely irritable, and the acids, which he had 

 before employed with success, brought on considerable irrita- 

 tion in the bladder. The addition of ten drops of laudanum 

 to each dose of the citric acid prevented this effect, and he 

 was thus enabled to continue the acid, which in a fortnight 

 relieved his complaint. 



This gentleman informed me, that whenever he omitted 

 the use of an acid diet, or took much wine, especially port, his 

 urine deposited the white sand and mucus, for two or three 

 successive days. 



Case 4. A gentleman, eighty years of age, who had twice 

 submitted to the operation for the stone within five years. 



