POSITIONS OF ALL KINDS 



Never was the demand so great for qualified 

 teachers and specialists. For ten years we have 

 given our time and energy to this work. Write for 

 our fret literature. State qualifications briefly. 



Co-operative Instructors' Association 



Marion ... Indiana 



A Series of 



Base Maps and Graphs 



Prepared by J. PAUL GOODE 



Professor of Geography in the 



University of Chicago 



THESE maps are accurate in detail, 

 of highest quality in drawing, being 

 superior to most maps used in books and 

 magazines. They are printed on a fine 

 quality of paper and give excellent results 

 with colored pencU, water color, or ink. 

 Maps come in five sizes from one to forty 

 cents each. 



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The University of Chicago Press 



Chicago ..... Illinois 



Outlines of Geologic History with 

 Especial Reference to North America 



Symposium Organized by | 



BAILEY WILLIS < 



Compilation Edited by 



ROLLIN D. SALISBURY 



GEOLOGISTS and all readers of geologic 

 literature 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, i 

 and form an admirable supplement to earlie: 

 treatises and manuals. 



The value of the book is greatly enhanced 

 by the fifteen paleogeographic maps by Bailey 

 WiUis which accompany the papers. 



316 pages, 8vo, cloth; price $1.50, postpaid $i.6s'>. 



The University of Chicago Press i 



Chicago ... IlIinoi>i 



r t 



THE ORIGIN OF THE EARTH 



By THOMAS C. CHAMBERLIN 



Head of the Department of Geology, The University of Chicago 



One of "The University of Chicago Science Series'' 



xii-f-272 pages, 8vo, cloth; $1.50 net, postpaid $1.65 



FROM THE PREFACE 



"In telling the story of this search for the mode by which the earth came 

 into being, we have let the incidents that led the inquiry on from one stage to 

 another fall in with the steps of the inquiry itself. It is in keeping with the 

 purposes of this series of booklets that the motives which set researches going 



should have their place with the quests that arose from them The final 



story of the birth of the earth will come only after a time, when the vestiges of 

 creation have been more keenly discerned and more faithfully rendered than is 

 possible now." 



THE UNIVERSITY OF CHICAGO PRESS 



CHICAGO ILLINOIS 



