t *59 3 



vier than water; digefted with muriatic acid, it 

 turns yellow; found in Bohemia and the tin mines 

 in Cornwall. 



b. Wolfram^ Manganefeous Wolfram ; combined 

 with tungftenic acid 64 ; oxyde of manganefe 

 22 ; oxyde of iron 13; filex and tin 2 ; of a 

 dark black colour ; lamellated, brittle, cryftallized 

 in comprelfed hexahedral prifms, terminated with 

 tetrahedral pyramids ; found in England, Siberia, 

 Bohemia, Saxony. 



R. URANITE. 



URANITE, or Uranium ; is of a deep-grey 

 colour, with a flight luftre ; above 6 times heavier 

 than water ; is foft enough to be cut with a 

 knife; foluble in nitric, fulphuric, and marine 

 acids ; is not precipitated by zinc ; phlogifticated 

 alkali added to the folution, produces a deep red 

 precipitate. Firft feparated in 1790, by Klap- 

 roth, from the mineral called Pechblende. Found 

 in a ftate of calx or oxyde, and mineralifed by 

 fulphur. 



a. Carbonate of Uranite ; Calciform or Oxyde 

 of Uranite, or Calcolite. The earthy oxyde of 

 uranite is a variety of an earthy texture ; of a 

 brimftone yellow; it is found folid, difperfed 

 through, and depofited upon other ores. The va- 

 riety called fpathofe uranite, is of a grafs-green 

 colour, and generally found cryftallized in cubes, 

 and in hexahedral prifms ; confifts of uranium, 



carbonic 



