WORKS PUBLISHED 
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Now ready. Pricu Is. 6c/. 
SIR RODERICK I. MURCHISON'S 
NEW GEOLOGICAL 
SKETCH MAP OF SCOTLAND. 
This Map, containing the recent most important groupings of the Scotcli Rocks 
by Sir Roderick I. Muroiiison, is, under his authority, now published at the 
"Geologist" Office, 156, Strand, accompanied by an Explanation of the Details. 
London ; "Geologist" Office, 156, Strand, and through all Booksellers. 
Will he ready on the 10th inst., 8fO., with Five ito. plates, 
A MONOGEAPH OP THE SCOTTISH CAEBON- 
IFEEOUS BEACHIOPODA. 
BY THOMAS DAVIDSON, Esq., F.R.S., F.G.S. 
London : "Geologist" Office, 156, Strand. 
TABLES OF THE DIVISIONS AND SUB-DIVISIONS 
OF THE 
ANIMAL AND VEGETABLE KINGDOMS, 
Adapted (with the latest emendations) for the use of Geologists and Naturalists. 
By S. J. MACKIE, F.G.S. 
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THE REV. F. WILTSHIRE'S PAPER 
"ON THE EED CHALK;" 
and other 
PUBLICATIONS OF THE GEOLOGISTS' ASSOCIATION. 
NOTES AND MEMOIRS ON METALLIFEROUS DEPOSITS. 
Selected and Edited by Henry Curwen Salmon, F.G.S, 
No. I. 
GENERAL CONSIDERATIONS ON THE FORMATION OF ORE- VEINS. 
Translated fium the German of Dr. Bernhard Cotta, of Freiburg. 
Price One Shilling. 
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