14 MBSSB8 BLACKWOOD AND SONs' PUBLICATIONS.' 



The Geology of Pennsylvania. 



A Govemment Survey ; with a General View of the Geology or THE United 

 States, Essays on the Coal- Formation and its Fossils, and a Description 

 of the Coal-Pields of North America and Great Britain. 



By Professor Henry Darwin Rogers, F.R.S., F.G.S., Professor of 



Natural History in the University of Glasgow. 



With Seven large Maps, and numerous Illustrations engraved on Copper and on Wood. 

 In Three "Volumes, Royal Quarto, £8, 83. 



Introductory Text-Book of Geology- 



By David Page, F.G.S. 



Third Edition, with Engravings. In Crown Octavo, price Is. 6d. 



" It has not been often our good fortune to examine a text-book on science of which we could 

 express an opinion so entirely favourable as we are enabled to do of Mr Page's little work." — 

 AtlicTicBum. 



Advanced Text-Book of Geology- 



DESCRIPTIVE AND INDUSTRIAL. 

 By David Page, F.G.S. 



Second Edition, enlarged, with numerous Eng^a^'ings, 6s. 



"An admirable book on Geology. It is from no invidious desire to xmderrate other works — 

 it is the simple expression of justice, which causes us to assign to Mr Page's Advanced Text- 

 Book the very first place among geological works addressed to students, at least among those 

 which have come before us. We have read every word of it, with care and with delight, never 

 hesitating as to its meaning, never detecting the omission of anything needful in a popular and 

 succinct exposition of a rich and varied subject." — Leader. 



"It is therefore with unfeigned pleasure that we record our appreciation of his Advanced Text- 

 Boole of Geology. We have carefully read this truly satisfactory book, and do not hesitate to say 

 that it is an excellent compendium of the great facts of Geology, and written in a truthful and 

 philosophic spirit." — Edinbwrgh PhilosophicalJoumal. 



" We know of no introduction containing a larger amount of information in the same space, and 

 which we could more cordially recommend to the geological student." — AtJienamm. 



Handbook of Geological Terms and 



Geology. 



By David Page, F.G.S. 

 In Crown Octavo, price 6a. 



" ' To the student, miner, engineur, architect, agriculturist, and others, who may have occasion 

 to deal with geological facts, and yet who might not be inclined to turn up half a dozen volumes, 

 or go through a course of geological readings for an explanation of the terra in question,' Mr Page 

 has carried out his object with the most complete success. His book amply fulfils the promise 

 contained in its title, constituting a handbook not only of geological tenns but of the science of 

 geology. It will not only be absolutely indispensable to the student, but will be invaluable as a 

 complete and handy book of reference even to the advanced geologist." — Literary Gazette. 



'* There is no more earnest living, practical worker in geology than Mr David Page. To his ex- 

 cellexit Introtktctory Text-Booh of Geology and big Advanced Text-Booh of Geology, Descriptive and 

 Industrial, he has, now added an admirable system of geological terms, with ample and clearlyr 

 written explanatory notices, such as all geological observers, whether they are able professors and 

 distinguished lecturers, or mere inquirers upon the threshold of the science, must find to be of the 

 highest value." — Practical Mechanics' Journal. 



" But Mr Pace's work is very much more than simply a translation of the language of Geology 

 into plain English ; it is a Dictionary, in which not only the meaning of the words is given, but 

 also a clear and concise account of all that is most remarkable and worth knowing in the objects 

 which the words are designed to express. In doing this he has chiefly kept in view the require- 

 ments of the general reader, but at the same time adding such details as will render the volume 

 au accex)table Handbook to the student and professed geologist." — The Press. 



