CATALOGUE OF PHILOSOPHICAL APPARATUS, &c. 33 



GERMANY. 



Drawer 51. Modern volcanic rocks, Eyfel. 



Including cellular and scoriaceous lava, together with the fossiliferous 

 limestone which accompanies it, some of which is dolomitic, and 

 yet contains shells, trilobites, corals, &c. 



Drawer 5 2. Modern volcanic rocks, including compact and cellular lava. 



Gmiinden lake, EyfeL 



Trass or volcanic tuff, from Bruhl, with wood imbedded. Loose 

 masses of Augite rock from the crater of Daun. 



Drawers 53, 54. Modern volcanic rocks from Bertrich, Lake of Laach, and 

 Andernach. Millstone of Niedermennig with imbedded mine- 

 rals, such as Hauyne, Spinell, &c. 



Drawer 55. Ancient volcanic rocks, including trachyte and basalt from the 

 Siebengebirge and other localities near Bonn. 



Vide Horner, Geological Transactions, vol. iv. p. 433, new series. 



Drawer 56. Ancient volcanic rocks consisting of cellular and compact Trap, 

 Trachyte from the Westerwald, and also from Oberstein near 

 Kreutznach. 



This latter locality contains many curious agates, for which see the 

 Mineral Collection. 



Drawer 57. Ancient volcanic rocks consisting of cellular and compact Trap, 

 with the semiopal they contain, from Hanau, aiM Bochenheim, 

 near Frankfort, &c. 



Drawer 58. Ancient volcanic rocks, consisting of compact and cellular Trap. 

 Vogelsgebirge, Hessia. 



Drawer 59. Trap rocks intruding themselves through sandstone, and altering 

 it in structure and hardness. Budingen and other places near 

 Eisenach, Hessia. 



Amongst the changes induced, is that from sandstone of the com- 

 mon kind into a hard and compact variety, crystallized (so to 



F 



