the Analyses of M. Klaproth. 239 



Analysis of PharmacoUte. 

 This fossil Is found in the cobalt ore of Wittichen, in 

 Furstenibcrti, in small white crystals, for the most part 

 capillary ; sometimes collected in tufts, sometimes united 

 in clusters, and rarely prismatic. Tliey have a silky lustre. 

 They are sometimes covered with a red crust of cobalt. 

 M. karsten has given an exact description of this new fos- 

 sil in his mineralogical tables. 



The specific gravity of pharmacolite, in clusters, is 2640. 

 A hundred parts of pure pharmacolite, separated from 

 the cobalt and siliceous matrix with which it is accidentally 

 mixed, contain 



Arsenic acid - - 50*54 

 Lime - - - 25 



Water - - - 24-46 



iOO 



Analysis of the Sand of Muska, near the River Aranyos ; 



culled Scorza iy the Wallachians . 

 Among the interesting productions of Transylvania we 

 ought not to forget a saudv fossil, of a pistachio green 

 colour, inclining 'to larin green, composed of small round 

 grains, entirely dull. It is found in small cavities of a 

 gray argillaceous stone of the valley of Muska. M. Muller, 

 who sent it to M. Klaproth, adds, that this sand, in regard 

 to its grain and colour, has a resemblance to several kinds 

 of gold ore. That grains of gold might easily be adulterated 

 by mixing it with them., if its specific gravity were not 

 much lighter: it is 3135. 



It is mixed with white grains of quartz, so fine, though 

 visible, that it is not possible to separate them. This sand 

 contains 



Silex 



Alumine - 



Lime 



Oxide of iron 



Oxide of manganese 



Loss by calcination 



Analysis 



