97 



produced phosphorus from it, which he afterwards' 

 caused to be prepared by HANKWITZ, an Apo- 

 thecary in London, for the natural Philosophers 

 of Europe! About the same time, another 

 analysis was instituted by LORENZO BEL- 

 LINI, an Italian, who found urine to be com- 

 posed of water, earth, and salts. It was after- 

 wards examined by BOERHAAVE, whose analy- 

 sis, considering- the time in which it was made, 

 was an excellent performance. Several others, 

 such as MARCGRAFF, POTT, HA.UPT, SCIILOS- 



SER, SCHOCKWITZ, BERGMAN, KLAPROTH, 



Sic. occupied themselves with examining 1 the 

 phosphates, which are contained in urine, and en- 

 deavoured to improve the methods of preparing 1 

 phosphorus from it. The younger ROUELLE'S 

 analysis of urine is even at this day of very consi- 

 derable merit. He discovered its peculiar and 

 characteristic constituent, which he called sapo- 

 naceous extract; he explained what salts are 

 contained in it, and compared the urine of men 

 with that of herbivorous animals, showing that 

 the latter did not contain phosphates, but carbo- 

 nate of lime, and benzoic acid. Some years 

 afterwards SCHEELE discovered, that the urine 

 of man contained phosphate of lime, dissolved in 

 an excess of acid, uric acid, which till his time 



H 



