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BIOLOGY AND GEOLOGY 



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 value for field trips, lectures, etc. 



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XHeUi^iversity of CHicago Press 



CHICAGO - - . - ILLINOIS 



Outlines of Geologic History with 

 [special Reference to North America 



Symposium Organized by 



BAILEY WILLIS 



Compilation Edsted by 



ROLLIN D. SALISBURY 



GEOLOGISTS and all readers of geologic 

 hterature will welcome the publication, 

 in book form, of an important series of 

 essays and discussions on the subject of geologic 

 correlation under the title. Outlines of Geologic 

 History with Especial Reference to North America. 

 They embody the present state of knowledge 

 and opinion concerning many of the funda- 

 mental problems of North American geology, 

 and form an admirable supplement to earlier 

 treatises and manuals. 



The value of the book is greatly enhanced 

 by the fifteen paleogeographic maps by Bailey 

 Wilhs which accompany the papers. 



316 pages, 8vo, cloth; price $1.50, postage extra 

 [weight 2 lbs.) 



The University of Chicago Press 



Chicago ... Illinois 



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THE UNIVERSITY OF CHICAGO PRESS 



The Summer Vacation Opportunity 

 at The University of Chicago 



The Summer Quarter 191 9 will receive the added inspiration of profes- 

 sors and instructors returning from war service in many lands. Stu- 

 dents and teachers, interested in keeping abreast of the times or in 

 completing work already begun, appreciate the opportunity of instruction 

 in a regular season of study under members of the University staff. 

 Scholars desiring to prosecute research in the libraries and laboratories 

 will find facilities for work under the most favorable conditions. 

 Courses are offered in all departments and include undergraduate and 

 graduate instruction in Arts, Literature, Science, Commerce and Ad- 

 ministration, Law, Medicine, Education, and Divinity. 



SUMMER QUARTER 1919 

 First Term June 16-July 23 Second Term July 24- August 29 



Students may register for either term or both. For the complete ANNOUNCEMENT of courses address 



THE UNIVERSITY OF CHICAGO, CHICAGO, ILL. 



