440 PHYSIOGRAPHY. CLASS n. 



4. The greatest quantity of hexahedral Gold is found in 

 alluvial soil in Brazil, Mexico, and Peru, sometimes in 

 pebbles of considerable size. The imbedded crystals from 

 Matto Grosso in Brazil indicate a formation in beds, or 

 rocks. Also in Transylvania a considerable quantity of 

 gold is obtained from Streamworks, as at Ohlapian near 

 Hermannstadt. At Wicklow in Ireland, near Leadhills, 

 and in Perthshire in Scotland*, in several districts of Ger- 

 many and in other countries, gold is found in the sand of 

 rivers, or in alluvial deposits from them. It has been ob- 

 served that the Rhine, the Danube, and others rivers are 

 auriferous only in plains, from whence it should seem, that 

 the gold is engaged in the diluvium. The mountain of Vo- 

 rospatak near Abrudbanya in Transylvania, is a remarkable 

 instance of a rock impregnated throughout with a small 

 portion of gold, which occurs crystallised and in various 

 imitative shapes in the numerous short and narrow veins 

 which traverse it in all directions. This mountain has been 

 worked to a considerable extent since the time of the Ro- 

 mans ; it consists of a kind of greywacke and porphyry. 

 Gold occurs in beds at Posing, Botza, Magurka, and other 

 places in Hungary, also in the Bannat with dodecahedral 

 Garnet, but here more rarely. In the same kind of repo- 

 sitories it is found at Schellgaden in Lungau, also in the 

 valleys of Gastein, Rauris, Fusch, &c. in Salzburg, and in 

 many other places along the chain of the Alps ; in the Schlan- 

 genberg in Siberia, &c. It is met with in veins at Crem- 

 nitz and Schemnitz in Lower Hungary, and in many dis- 

 tricts of Transylvania, as at Offenbanya, where it is ac- 

 companied by prismatic Antimony-glance, at Zalathna, 

 where it is accompanied by native Tellurium, and in seve- 

 ral mines between Nagyag and Boitza. At Nagyag it oc- 

 curs along with the prismatic Tellurium-glance. 



* The variety from Leadhills is of a high yellow colour, 

 that from Turrich in Glen Coich in Perthshire is very pale. 

 A specimen of the latter in Mr ALLAN'S collection weighs 

 upwards of seven guineas. H. 



