1XXX NOTES. 



rocks at the time of their eruption ; as well as on the transformation of schist 

 into gneiss by the action of granite, and of the substances accompanying its 

 eruption. 



C 543 ) p. 23?. Darwin, Volcanic Islands, 1844, pp. 49 and 154. 



(***) p. 238. Moreau de Jonnes, Hist. phys. des Antilles, T. i. pp. 136, 

 138, and 543. Humboldt, Relation historique, T. iii. p. 367. 



f 3 * 5 ) p. 238. Near Teguiza. Leop. von Buch, Canarische Inseln, S. 301. 



f 246 ) p. 238. Leop. von Buch, Can. Inseln. S. 9. 



0"?) p. 239. Beruhard Cotta, Geognosie, 1839, S. 273. 



f 48 ) p. 239, Leop. von Buch, iiber Granit und Gneuss in den Abhandl. 

 der Berl. Akad. aus dem J. 1842, S. 60. 



t 249 ) p. 239. The mural masses of granite near Lake Kolivan, divided into 

 numerous parallel beds, contain few crystals of titanium ; feldspar and albite 

 predominate. Humboldt, Asie centrale, T. i. p. 295; Gustav Rose, Reise 

 nach dem Ural, Bd. i. S. 524. 



C 250 ) p. 239. Humboldt, Relat. hist. T. ii. p. 99. 



C 251 ) p. 239. See in Rose's work above cited, Vol. i. p. 584, the plan of 

 Biri-tau, which I drew from the south side, where the Kirghis tents stood. 

 On spheroids of granite which separate into concentric layers, see my Relat. 

 hist. T. ii. p. 597 ; and Essai ge'ogn. sur le gisement des roches, p. 78. 



C 82 ) p. 240. See Humboldt, Asie centrale, T. i. pp. 299311 ; and th 

 drawings in Rose's Reise, Bd. i. S. 611 : the latter shew the curvature in the 

 layers of granite which Von Buch has pointed out as characteristic. 



253 ) p. 240. This remarkable superposition was first described by Weiss, 

 in Karsten's Archiv fur Bergbau und Huttenwesen, Bd. xvi. 1827, S. 5. 



(2") p. 240. Dufrenoy and Elie de Beaumont, Geologic de la France, 

 T. i. p. 130. 



^ a ) p. 240. These intercalated beds of diorite form an important feature 

 in the mining district of Naila, near Steben, where I studied mining during 

 the latter part of the last century, and with which my happiest youthful re- 

 collections are associated. Compare Hoffmann, in Poggendorff s Annalen, 

 Bd. xvi. S. 558. 



C 256 ) p. 241. In the southern and Bashkirian portion of the Ural. Rose, 

 Reise, Bd. ii. S. 171. 



C 267 ) p. 241. Gustav Rose, Reise nach dem Ural, Bd. ii. S. 4752, 

 On the identity of eleolithe and nepheline (the latter containing rather more 

 lime), see Scheerer, in Poggend. Ann. Bd. xlk. S. 359381. 



^p 58 ) p. 245. Se* Mitscherlich's admirable researches, in the AbhandL 



