436 PHYSIOGRAPHY. CLASS IT. 



4. There are but few countries in which hexahedral Sil- 

 ver is found in any considerable quantity. Among these 

 are the mining districts of Saxony and Bohemia, also Nor- 

 way and Siberia, but particularly Mexico and Peru. It 

 occurs more sparingly in the Hartz, in Hungary, in Swa- 

 bia and Franconia, and other countries. The Saxon va- 

 rieties are chiefly known from Freiberg, Schneeberg, Jo- 

 hanngeorgenstadt, &c. ; the Bohemian varieties from Joa- 

 chimsthal, Przibram, Ratiborzitz, &c. Large and well de- 

 fined crystals were formerly found at Kongsberg in Nor- 

 way. It is met with at Andreasberg in the Hartz, at Alt- 

 wolfach in Swabia, in the Dauphiny, in France, at Schem- 

 nitz in Hungary, &c. ; it is found likewise in Wheal Mexi- 

 co, Wheal Duchy, and several other mines of Cornwall. 

 The localities of auriferous native Silver are Kongsberg in 

 Norway, and Schlangenberg in Siberia. 



5. The employment of silver in coinage, in the manu- 

 facture of plate, and of various articles of luxury, is well 

 known. Other metals are frequently covered with a coat of 

 it ; it is useful in the construction of several parts of the 

 chemical and philosophical apparatus, for which, however, 

 it is required to be perfectly pure. It is used also in phar- 

 macy. 



GENUS VII. GOLD. 

 1. HEXAHEDRAL GOLD. 



Hexahedral Gold. JAM. Syst. Vol. III. p. 55. Man. p. 262. 

 Native Gold. PHILL. p. 322. Gediegen Gold. WERN. 

 HofFm. H. B. III. 1. S. 10. Gediegen-Gold. Electrum. 

 HAUSM.LS.100.102. Gediegen-Gold. LEONH. S.177. 

 Or natif. HAUY. Traite', T. III. p. 374. TabL comp. 

 p. 73. Traite, T. III. p. 235. 



Fundamental form. Hexahedron. Vol. I. Fig. 1 . 



Simple forms. H(r), Transylvania; O(w). Vol.1. 



Fig. 2. Siberia; D (s) Vol. I. Fig. 31., Catharinen- 



