204 Elements of Mineralogy* 



SPECIES XXVII. 



Marine Salt of Copper. 



This has been found in Saxony in the mine 

 of Johngeorgenftadt ; it is of a greenifh co- 

 lour and foliated texture, moderately hard, 

 and fometimes tranfparent and cryftalized ; it 

 has been taken for a fort of mica, but Mr* 

 Bergman found it to confift of copper and 

 marine acid, with a little argillaceous earth, 

 2 Bergm. 431. Another fpecimen of a purer 

 fort, and bluifh green colour,was alfo depoiit- 

 cd in the mufeum of UpfaL Ibid. 



SPECIES XXVIII. 



Marine Salt of Manganefe. 



Mr. Hielm is the only perfon who has as 

 yet found this fait ; he difcovered it in fome 

 mineral waters in Sweden; it is precipitated 

 of a whitifh yellow colour by the Pruffian 

 alkali, and of a brownifh yellow by the mi- 

 neral Alkali; it does not cryftalize in any 

 diftincl: form, but attracts the moifture of 

 the air ; to obtain it free from iron, it fhould 

 be precipitated by the mineral alkali, re- 

 diffolved in nitrous acid, then calcined until 

 this acid is expelled, and the refiduum treated 



with 



