CATALOGUE OF PHILOSOPHICAL APPARATUS, &c. 35 



Drawer 72. Pearlstonef of Beudant. 



Drawer 73. Millstone porphyry and trachytic conglomerate of Beudant. 

 Drawer 74. Suite of trachytic rocks, Glasshutte and HMritz. 

 Drawer 75. Trachyte, sundry varieties, near Pesth. 



Drawer 76. Mineral veins in trachytic and other porphyries, Schemnitz. 



Of the volcanos of Hungary, Beudant's Voyage, 3 vols. 410., is the most complete account, 

 My own Work, ch. v. contains a short abstract of his Report, together with observations of 

 my own. 



Drawer 77. 



Drawer 78. 



Drawer 79. Dolomites attributed to volcanic action, with the porphyries ac- 

 companying them. Val di Fassa, Tyrol. 



Drawer 80. Minerals from the Val di Fassa. Limestone rock converted into 

 Dolomite by volcanic action ||. Lake Lugano. 



ITALY. 



Drawer 81. Eocks connected with the volcanos of the Vicentin, Schio. 

 Named by the Abbe Maraschini. 



See Volcanos, p. 143. 



Drawer 82. Trap dykes and cellular lavas near Schio, Vicentin. 

 Drawer 83. Trachytes and cellular lavas, Euganean Hills near Padua. 



Drawer 84. Cellular volcanic rocks associated with tertiary rocks. Monteccio 

 Maggiore, Vicentin. 



f A form of trachyte made up of little gra- porous character. 



miles with a pearly lustre, richer in Silica than || On this curious question see " Volcanos," 



either trachytic porphyry, obsidian, or pumice, p. 1 50, or the original memoir of Von Buch in 



and containing more water in its composition. Ann. des Soc. Nat. 1827, also De La Beche's 



A very quartzous form of trachyte, much Views of Geological phenomena, 

 employed for millstones from its harsh, gritty, 



F 2 



