NOTES. IxXXl 



der Berl. Akad. for the years 1822 and 1823, S. 2541 ; in Poggendorff's 

 Annalen, Bd. x. S. 137152 ; Bd. xi. S. 323332 ; Bd. xli. S, 213216 

 (Gustav Rose, iiber Bildung des Kalkspaths und Aragonita, in Poggend. Ann. 

 Bd. xlii. S. 353366 ; Haidinger, in the Transactions of the Royal Society 

 of Edinburgh, 1827, p. 148). 



P) p. 245. Lyell, Piinciples of Geology, Vol. iii. pp. 353 and 359. 



^ 80 ) p. 247. The view here given of the relations of position under which 

 granite is found, expresses its general or leading character. But its aspect in 

 some localities gives reason to believe that it was occasionally more fluid at 

 the time of eruption : see p. 239, as well as the description of part of the 

 Narym chain, near the frontiers of the Chinese territories, in Rose's Reise 

 nach dem Ural, Bd. i. S. 599. Similar exceptional indications have been 

 observed in trachyte (Dufrenoy et Elie de Beaumont, Description geologique 

 de la France, T. i. p. 70). Having before spoken in the text of the narrow 

 apertures through which basalts have sometimes issued, I would mention the 

 large fissures which have afforded a passage to melaphyres, which must not be 

 confounded with basalts. See Murchison's interesting description of a fissure 

 480 feet wide, through which the melaphyre has been ejected in the coal 

 mine at Cornbrook, Hoar- Edge (Silurian System, p. 126). 



f 61 ) p. 247. Sir James Hall, in the Ediub. Trans. Vol. v. p. 43 ; Vol. vi. 

 p. 71 ; Gregory Watt, in the Phil. Trans, for 1804, Pt. ii. p. 279 ; Dartigues 

 and Fleuriau de Bellevue, in the Journ. de Phys. T. Ix. p. 456 ; Bischoff, 

 Warmelehre, S. 313 and 443. 



O p. 248. Gustav Rose, in Poggendorff's Annalen der Physik, Bd. xlii 

 S. 364. 



C 263 ) p. 248. On the dimorphism of sulphur, see $ 5563, in Mitscher- 

 lich's Lehrbuch der Chemie. 



f 64 ) p. 248. On gypsum considered as a uniaxal crystal, and on the 

 sulphate of magnesia and oxides of zinc and nickel, see Mitscherlich, in 

 Poggend. Ann. Bd. xi. S. 328. 



26S ) p. 248. Coste, Versuche, im Creusot iiber das briichig werden des 

 Stabeisens, in Elie de Beaumont, Mem. geol. T. ii. p. 411. 



(5 66 ) p. 248. Mitscherlich, iiber die Ausdehnung der krystallisirten Korper 

 durch die Warme in Poggend. Ann. Bd. x. S. 151. 



(5 67 ) p. 249. On the double system of divisional planes, see Elie de Beau- 

 mont, Geologic de la France, p. 41 ; Credner, Geognosie Thiiringens und des 

 Harzes, S. 40 ; Romer, das Rheinische Uebergangsgebirge, 1844, S. 5 und 9. 



C 68 ) p. 249. The silex is not merely coloured by oxide of iron, but is 



