Saturnite. 36 1 



litmus; with alkalis it forms cryftalizable 

 falts ; with barytes calcareous earth, and mag- 

 nefia infoluble compounds. 



2. This folution is precipitated white by 

 the PruJJian alkali, and the precipitate is fo~ 

 luble in water. 



3. It precipitates the folutions of vitriols 

 of iron, zinc, copper, and the nitrous folu- 

 tions of filver, mercury and lead, and that 

 of lead in marine acid; all thefe precipitates 

 are white : the folution of tin in marine 

 acid is precipitated blue, but the folutions of 

 gold and fublimate corrofive are not altered 

 by it. 



4. The folutions of chalk or alum are not 

 altered by it, but that of barytes in the 

 acetous acid is precipitated, and the precipi- 

 tate is infoluble. 



CHAP. XIX. 



Saturnite. 



The fubftance to which I ventured to 

 give this name, is faid by Mr. Monnet, to be 

 found in the lead mines of Pottl/aoven in 

 Brittany, and is feparated from the lead ore 

 during its torrefadion. According to him 

 it relembles lead in its colour and fpecific 



gravity, 



