2 Advertising Sheet of the ie 
Pror. SILLIMAN’S ADDRESS 
Association of American Geologists, 
delivered at their annual meeting, held at Boston, April 25, 1842,) 
has been published and is for sale in New York and London, by | 
WILEY & PUTNAM. — 
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New York, October, 1842. 
DR. MANTELL’S WORKS. 
Just published and for sale by 
RELFE & FLETCHER, 17 Cornhill, London, 
The Sixth Edition of Thoughts on a Pebble, with 2 Colored 
Plates and Wood oe elegantly bound. 6d. 
rth Edition of the Wonders of Geology. 2 vols. with nume- 
Fou 
rous Plates and Illustrations, siiad 18s, Large Bridgewater Edi- 
tion, a ees work, price 
ring for Publication—Populat 1 Lectures on the ‘Nervous 
Saha one Naluep, with numerous Plates 
Coe May, 1 
Griffin’s Cheap Chemical pT 9% 
Tue subscribers have on sale every kind of French, German, and 
English Cuemicat Apparatus, employed by Analytical Chemists, 
Lecturers, Students, and Chemical Manufacturers. The instruments 
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