3- Elements of Mineralogy. 



mafles pf fand, particularly the yellowiftt 

 red, or violet, and in this ftate it is fo gene- 

 rally diffufed through all fpecies of Earths, 

 though in exceeding fmall quantity, that Mr. 

 Bergman thinks it is more univerfally found 

 than any other metal, except iron. 2 Erde. 

 Befchr. 313. If ico pounds of fand con- 

 tain 24 grains of gold, it is faid the feparatioa 

 is worth attending to, hut in Africa^ 5 pounds 

 of fand often contain 63 grains of gold, or 

 even more ; the heavieft fand, which is often 

 black or red, yields morT. In Hungary , 10,000 

 pounds of fand yield but 10 or 12 grains of 

 gold -, it was extracted, but withlofs. Born, 

 letters from Hungary. Or vjfitfy 'unbodied 

 in fome matrix, and in this ftate it is found, 

 either in a granular, foliated, or ramified 

 form, in ftones of the calcareous, but chiefly 

 of the filiceous genus, as fpar, gypfum, felt- 

 fpar, hornblend, jafpar, and moft frequently 

 quartz, in Hungary ^ Tyrole, Siberia^ &c. 



4. Gold interfperfed through fand, is fepa- 

 rated by mere mechanical means, as is amply 

 defcribed in the Paris Memoirs 1718* and 

 1736, and Borns's Letters from Hungary. 



$. But when it is imbodied in Earths and 

 ftones, thefe may be eflayed in the moift way 

 b'y pounding them very fine, weighing a de-^ 

 terminate portion, and attempting their fo- 



lutio n, 



