1:^0 GEOLOGY. 



Vezian, Alex. La pciiode glaciaire falunieniie. [Glaciation in the 

 Tcriod of the Faluns.] liev. Sci. xi. pp. 171-176. 



Notices the presumptive evidence of a glacial period at the close of 

 the Eocene, again at the end of the Cretaceous, during the Permian, 

 possibly during the Carboniferous, and again in the Devonian. Enlarges 

 on that during the middle of the Miocene, citing the large erratic 

 blocks of the Superga hill, Turin, and argues that the Swiss " Nagel- 

 fluh " was glacial moraine matter brought down into lakes, and there 

 redepositcd, by torrential action. E. B. T. 



La theorie des Systemes de soulevement, a propos du sys- 



teme du mont Seny. [The Theory of Systems of Upheaval, with 

 reference to the Mt. Seny System.] Cornet. Bend. t. Ixxxiii. 

 p. 951. 



Le Jura. [The Jura.] Ann. Club Alp. Frang. 2 ann. 



p. 605. 

 Orographic and geological sketch. 



Vincent, G. Note sur la faune Bruxelhenne des environs de Brux- 



elles. [Bruxellian Fauna in the Neighbourhood of Brussels.] 



Ann. Soc. Mai. Belcj. t. x. pp. 23-32. 



Gives a sketch of the researches of the older geologists respecting the 



Bruxellian fossils, followed by a complete list of these fossils, showing 



their distribution and comparative rarity in the quartzose and in the 



calcareous sands. The faunal changes are thus shown to have been 



but slight during the Bruxellian era. G. A. L. 



Vincent, G., A. Rutot, and E. Vanden Broeck. [xVccount of Besults 

 respecting the Tertiary Beds round Brussels.] Moniteur Industy^iel 

 Beige, vol. iii. p. 354. 



Eeports the views of the authors, more especially as to the alteration 

 of parts of the sandy beds in the series. 



Viollet-le-Duc, E. Le Massif de Mont Blanc. Etude sur sa Constitu- 

 tion Ge'odcsique et Geologique, sur ses Transformations et sur I'Etat 

 Ancien et Modern de ses Glaciers. [Mt. Blanc, its Geodesy, 

 Changes, and Glaciers.] Pp. xvi, 280; 112 woodcuts. 8vo. 

 Paris. 

 Chap. 1. Primitive form of Mt. Blanc. 2. Causes of accumulation 

 of snow. 3. Snow and neves. 4. Glaciers and glaciation. 5. Mo- 

 raines, advance of glaciers. 6. Glacial mud. 7. Formation of torrents. 

 8. Courses of higher torrents. 9. Torrents and lake-basins. 10. Causes 

 of increase and decrease of the Mt. Blanc glaciers. 11. Topography. 

 12. Human influence on the action of water. There are geological 

 remarks here and there. W. H. D. 



Virlet d'Aonst, — . De I'Age geologique de quelques filcns metal- 

 liques, et en particulier des filons de mercure. [Age of some 



