1826.] Proceedings of Philosophical Societies, 459 



Lastly, the Council propose for the consideration of the 

 general meeting the propriety of expending a portion of their 

 income in the collection of geological specimens : thereby pro- 

 moting the Society by enlarging the knowledge of our rock- 

 formations and collecting several pieces of the same rocks for 

 the purpose of exchanges. Simple crystalline minerals cannot 

 be obtained to any great extent, but at prices very far exceeding 

 our funds, and indeed such Cornish minerals may be found in 

 the collections of all extensive mineral dealers. Rock-specimens, 

 however, are not to be met with in such places ; but they can 

 be collected with comparatively little expence ; and a series of 

 granite, slate, and serpentine rocks would be the most valuable 

 return the Society could make in their exchanges with scientific 

 institutions. Moreover such intercourse cannot fail of being 

 highly advantageous to both parties, and may be instrumental 

 in the advancement of the science of geology. 



By order, H. S. Boase, Secretary. 

 October 13, 1826. 



The following Papers have been read since the last Report: — 



On the Granite of the West of Cornwall. By Joseph Carne, 

 Esq. FRS. &c. Member of the Society. 



On the Sand Banks of the Northern Shores of Mount's Bay. 

 By H. S. Boase, MD. Secretary of the Society. 



Some Account of certain Ancient Circles and Barrows on the 

 Summit of Botrea Hill, in the Parish of Sancreed. By T. F. 

 Barham, MD. Librarian of the Society. 



On the Changes which appear to have taken place in the 

 primitive Form of the Cornish Peninsula. By John Hawkins, 

 Esq. FRS. &-C. Honorary Member of the Society. 



On the Temperature of Mines. By Henry Boase, Esq. Trea- 

 surer of the Society. 



An Account of some Circumstances connected with the Heave 

 of a Copper Lode by a Flucan Vein in the Consohdated Mines, 

 in the Parish of Gwenap. By Mr. W. J. Heftwood, Member of 

 the Society. 



On the Geology of the Coast from Sennen Cove to the Land's 

 End. By Joseph Carne, Esq. FRS. &c. 



On a singular Exudation of Gas in the Union Mines, in the 

 Parish of Gwenap. By Mr. W. J. Henwood. 



Observations on the Suspension of the Stannary Courts. By 

 Henry Boase, Esq. 



On the Importance of a Deep Adit from the Northern Coast. 

 By R. Edmonds, Esq. Member of the Society. 



A Notice relative to a new Fusee for the Blasting of Rocks. 

 By R. Collins, Esq. Member of the Society. 



An account of the Quantity of Tin produced in Cornwall in the 

 Year ending writh the Midsummer Quarter 1826, By Joseph 

 Came, Esq, FRS» 



