m 



ON T»E NATURE OF OXlMUllIATlC ACIB. 



The resultj 

 were uniform 

 in tliree indi. 

 vHluals. . 



Other sub- 

 stances tried. 



Action of car 

 bonic acid on 

 the urine. 



Sometimes 

 useful. * 



Tliese experiments ^vere repeated upon three dififerent 

 individuals, and there was always a unifbrmity in the results* 



When the medicines were taken some hours after food 

 being received into the stomach, their effects lipoh the itriiic 

 were retarded, but not prevented. 



The effects of many other substances upon the urine 

 were examined into during this investigation, but they 

 varied go ranch according to circumstances, that no satis- 

 factory results were produced. 



As it is found in the foregoing experiments, that the 

 effects of soda on the urine are moditied by the presence of 

 carbonic acid, the foUowingexperiment was made, to ascer- 

 tain, wbether auy sensible effects are prodiiced by that acid 

 on healthy uriJ?, 



Twelve ounces of water very highly impregnated with 

 carbonic acid were taken upon an empty stomach at nine 

 o^clock in the morning. At ten o'clock about eight ounces 

 of urine were voided, which had a natural "appearance; but, 

 when compared with urine voided under common circum- 

 stances, was found to contain a superabundant quantity of 

 carbonic acid : this gas was copiously given off when the 

 ufine was gently heated, or when it was exposed under the 

 exhausted receiver of an air pump. 



In a patient who had a calculus of large dimensions ex- 

 tracted from the bladder, composed entirely of the phos- 

 phates, and whose stomach did not admit of the use of 

 stronger acids, carbonie acid was given in water ; it was 

 found peculiarly grateful to the stomach, and upon examin- 

 ing the urine during its use, the phosphates were only voided 

 in solution, but when at any time it was left off, they were 

 Toided ia4be form of white sand. 



Chentvical 



theory Viibte 

 10 change. ' 



VIII. ' 



Observations and Experiments 07i the Nature of Oximuriatic 

 Acid, and its relation to Muriatic Acid, by J. Murrat, 

 Lecturer on Chemistry, Edinburgh, 



• To Mr. NICHOLSON. 



JL HE theories of chenaistry^ iresti ng on evidence n ot 

 strictly dempBStrative, are^ jiab|e. to^ftetjijeajt modification 



from 



