170 



PHYSICAL GEOLOGY. 



1. VOLCANIC AND SUBTERRANEAN PHENOMENA; 

 METAMORPHISM. 



Anon. Des affaissements du sol attribues a I'exploitation liouillere. 



[On " Creeps."] Comite de rUnion des charbonnages, mines, et 



Tisines metallurgiques de la province de Lie'ge. 335 pp. ; atlas of 



22 plates. 4to. Liege. 



Brown, A. J. The Formation of Fissures, and the Origin of their 



Mineral Contents. Trans. Amer. Inst. Min. Eng. toI. ii. pp. 215- 



219. 



Refers to American mining districts. Concludes that fissures are 



formed in nearly all cases by earthquakes, that they have been filled 



by melted injections, by aqueous agencies, or by sublimation, and that 



the minerals are not derived from the wall-rock, but from below the 



zone of sedimentary rocks. W. W. 



Burton, Capt. The Volcanic Eruptions of Iceland in 1874 and 



1875. Proc. R. Soc. Edin. vol. ix. no. 93, pp. 44-58 ; 2 maps. 

 Gives facts relating to the eruptions, and indicates on the maps the 

 £. and N.E. limits of the ash-showers N.E. of the Vatna Jokull. 



Carruthers, John. Yolcanic Action regarded as due to the Retarda- 

 tion of the Earth's Rotation. Phil. Soc. Wellington, N. Zealand. 

 Pp. 20. 8vo. Wellington. 



Chanconrtois, A. E. B. de. Sur le Roseau pentagoual de M. Elie 

 de Beaumont. [Elie de Beaumont's Pentagonal Network.] Bull. 

 Soc. Oeol. France, 3 ser. t. iii. pp. 328^343. 



An approving resume of Elie de Beaumont's Pentagonal system. 



Cossigny, A. E. B. de. Sur la correlation qui existe entre les oscil- 

 lations du sol et la configuration des cotes de la mer. [Relation 

 between Oscillations of Land and Configuration of Sea-coasts.] 

 Bull. Soc. Oeol. France, 3 ser. t. iii. pp. 358-367, 5 figs, in text. 

 Shows the connexion between cordons littoraucc (raised beaches) 

 and the rising of the land. Attributes to the latter the gradual silting 

 up of the Petit- Rhone. G. A. L. 



D[ana], J. D. Notice of Prof. Shaler's paper on Recent Changes of 

 Level on the Coast of Maine, with reference to their origin and 

 relation to other similar changes. Amer. Journ. ser. 3, vol. ix. 

 pp. 316-318. 

 Discusses approvingly Prof. Shaler's views as to the depression of the 

 land occupied by the ice during the glacial period being due to the 

 weight of the ice itself. G. A. L. 



