May 18.— G. J. Roupell, Esq. M.D. of Caroline Street, Bedford 

 Square ; and Isaac Lyon Goldsmid, Esq., of Dulwich Hill House, 

 Camberwell, — were elected Fellows of the Society. 



A notice was read " On a Whin dyke in Cooper Colliery, near 

 Blythe, Northumberland," drawn up from the information of Mr. 

 Bryham, agent at the Cooper Coal Works, by W. C. Trevelyan, 

 Esq. F.G.S. &c. 



The total length to which this dyke has been traced is 1577 yards. 

 It increases in breadth from S. to N. ; being 4-f- yards wide near the 

 most southern point, where it has been cut through, and 21 -J- yards 

 wide at the most northern spot hitherto observed. It is formed of 

 two walls of greenstone, each from two to four feet in thickness ; 

 and these walls contain between them a breccia, composed of frag- 

 ments of shale and whin, cemented by calcareous and argillaceous 

 matter. Carburetted hydrogen and pure water issue from a narrow 

 fissure in the broadest part of the dyke. The coal of the beds through 

 which the dyke passes is charred, and deteriorated in quality, to the 

 distance of about forty yards on each side. 



The reading of a paper was begun, " On the fixed rocks of the 

 Valley of the St. Lawrence, in North America," by John J. Bigsby, 

 Esq. M.D. F.G.S. &c. 



June 1. — Henry Campbell White, Esq. of Comer-Hall, Hemel 

 Hempstead ; and Samuel Sharpe, Esq. of New Ormond Street, 

 London, — were elected Fellows of the Society. 



The reading of Dr. Bigsby's paper, begun at the last meeting, 

 was concluded. 



The observations of the author in person were made principally 

 in the Canadas, and on the northern shores of the great Lakes ; and 

 he connects with them a sketch from various authorities, of the re- 

 gions which border the Valley of the St. Lawrence upon the S.W. 

 and the lakes on the south and west of Upper Canada. 



The north-western side of the St. Lawrence Valley consists 

 principally of an arm of the primitive ranges which extend from 

 Labrador and Hudson's Bay to the sources of the Mississippi: and 

 from this, at the outlet of Lake Ontario, a band is sent out across the 

 Valley of the St. Lawrence to join the primitive formations of the 

 United States. Numerous boulders of a limestone resembling the 

 mountain limestone of England, are found on the north shore of Lake 

 Erie ; and this with other rocks in horizontal strata appears in situ 

 at Lake Huron : the line of junction with the primitive rocks ex- 

 tending from Penitanguishene to Kingston, thence up the Ottawa to 

 the Falls of the Chat, and the Longsault Rapids, from whence it 

 stretches north-easterly to Cape Tourment in the north bank of the 

 St. Lawrence 30 miles below Quebec. 



The strata which overlie the transition rocks, in the St. Lawrence 

 Valley, are, in a descending order, the following : — 



1 . Dark shale resting upon limestone, and containing terebratulae, 

 favosites, turbinolia, milleporites, trilobites, &c. ; this extends for 

 many miles, along the south of Lake Ontario and the south-eastern, 

 shore of Lake Erie. 



