This day is Published^ 



I. — A new Edition, being the Fifth, 

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INTRODUCTORY TEXT-BOOK OP GEOLOGY. 



By DAVID PAGE, F.G.S. 



II. — A New Edition, being the Thied, 

 Enlarged and more fully illustrated, price Qs., 



ADVANCED TEXT-BOOK OP GEOLOGY, 



DESCEIPTIYE AND INDUSTRIAL. 

 By DAVID PAGE, E.G.S. 

 William Blackwood and Sons, Edinburgh and London. 



Just completed, in Two Volumes, Sixty-two coloured Plates, £2. IQs. 



ELEMENTS OF CONCHOLOGY: 

 an intkoduction to the 

 NATURAL HISTORY OP SHELLS, 



AND OF THE ANIMALS WHICH FORM THEM. 



By LOVELL EEEVE, F.L.S., F.G.S., 



C0BEB8P0NDING MEMBER OF THE NATURAL HISTORY SOCIETY OF WUETEMBEEG, AND OF THB 

 LYCEUM OF NATURAL HISTORY OF NEW YORK. 



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Quekett's Pocket Dissecting Microscope, with three Lenses, etc, folding into 



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Higliley's Large Microscope, on Brooke's Tripod Stand, Rackwork Adjust- 

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Catalogue (post free for two postage stamps) of Scientific Educational Collections, 



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