265 



ravia and the West of Hungary ; by Dr. Ami Boue" For. Mem. 



G.S. &c. 

 December 15. — An explanatory sketch of a Geological Map of Tran- 

 sylvania ; by Dr. Ami Bou^, For. Mem. G.S. &c. 

 — — On the Astronomical Causes which may influence 



Geological Phenomena; by John Frederick William Herschel, Esq. 



F.G.S. F.R.S. &c. 

 January 5, 1831. — On the general structure of the Lake Mountains 



of the North of England, and on the great dislocations by which 



they have been separated from the neighbouring Chains ; by the 



Rev. Adam Sedgwick, Pres. G.S. F.R.S., Woodwardian Professor 



in the University of Cambridge. 

 Jan. 19 and Feb 2. — Supplementary Observations on the Structure 



of the Austrian and Bavarian Alps ; by Roderick Impey Murchi- 



son, Esq. Sec. G.S. F.R.S. 

 Feb. 16. — On the Geology of the Island of Juan Fernandez in the 



Pacific j by Alexander Caldcleugh, Esq. F.G.S. 

 ■ A Letter from Peter Cunningham, Esq., to John Barrow, 



Esq., F.R.S., on the Geology of Hunter's River, New South Wales j 



and communicated bv Mr. Barrow. 



