4 Advertising Sheet of the 
ASSOCIATION OF AMERICAN GEOLOGISTS. 
Pror. Eowarp Hitcucock’s Appress before this Association 
at their second meeting in Philadelphia, in April last, has been pub- 
lished by the subscriber in an 8vo. pamphlet of fifty pages, on fine 
paper, in accordance with the resolution of the meeting. 
Members of the Association and others who wish this address, 
can have it forwarded to them by mail, or as they may direct, by in- 
forming the subscriber of the number of copies they want 
The subscriber has also published in Svo. on fine paper, pp. 82, a 
small edition of the Address, with the proceedings of the Associa- 
tion at their two meetings, (viz. in Philadelphia, April, 1840, and 
April, 1841,) as they are published by the Secretaries in the Amer- 
ican Journal of Science, with a list of the members of the Associa- 
tion: these two under one cover. 
Prof. Hitchcock’s address will be sold to members at one dollar 
for six copies; to non-members at one dollar for four copies, or 
25 cents each. It is expected that the money will accompany the 
orders. ‘The Address and Proceedings, under one cover, will be 
sold at one dollar for three copies, or singly, at fifty cents each. 
Either of the above may be ordered through any of the book- 
sellers who act as agents for the American Journal of Science. 
B. Situman, Jr., 
One of the Assistant Secretaries. 
The eleventh meeting of the British Association for the Advance- 
ment of Science, will be held in Plymouth, commencing on Thurs- 
day, July 29, 1841, and concluding on "Wednesday, August 4, 
Joun Taytor, F. R.S., General Treasurer. 
James Yares, F. R.S., Secretary to the Council. 
London, April 26, 1841. 
Association of American Geologists. 
Tus body holds its third annual meeting at Boston, commencing 
on Monday, the 25th of April, 1842. 
Officers for the meeting in Boston : 
Samuet Grorce Morvon, M. D., &c., Chairman. 
Cuarves T. Jackson, F. G. S., (France,) M. D., &c. Secretary. 
Prof. Epwarp Hircucocx 
Dr. Cuarves T. Jackson, + Local Committee. 
Mr. Moses B. Witu1ams, 
Prof. B. Siruman, LL. D., &c. to deliver the opening address. 
