AND HIS DISEASES. 107 



of magnesia, soda, and potass are recommended ; the latter, 

 however, is much more preferable ; the soda is apt to couj- 

 bine with the uric acid, forming an insoluble compound, 

 while the magnesia, when long continued, is apt to cause 

 intestinal concretions. Carbonate of potash should be given 

 from one to two ounces daily, largely diluted with water. 

 When, however, it is found to be phosphatic or oxalic, the 

 mineral acids should be substituted, — hydrochloric or nitro- 

 muriatic from two to four drachms daily, with plenty of 

 water, gruel, and other dilutents. 



Most cases, however, which come under our notice require 

 surgical interference for the removal of the stone. See 

 Lithotomy, page 198. 



