OUTLINES OF GEOLOGIC HISTORY 
WITH ESPECIAL REFERENCE TO NORTH AMERIC 
A Series of Essays Involving a Discussion of Geologic Correla- 
tion, Originally Presented before Section E. of the American 
Association for the Advancement of Science 2 J 
the publication, in book form, of an important series of essays 
and discussions on the subject of geologic correlation under the 
title, OurLines oF Geotocic History witH ESPECIAL REFERENCE TO 
NortH America. The symposium was organized by Bailey Willis, and 
the papers were originally presented before Section E of the American 
Association for the Advancement of Science at Baltimore in December, 
1908. They were first published by the Fournal of Geology and are 
now brought out in book form under the editorship of Rollin D, Salisbury. 
Ce pies and all readers of geologic literature will welcome 
The series as a whole represents the successful execution of the 
plan on which all the monographs were based—namely, to formulate 
the principles of correlation as applied to the formations of the various 
geologic periods. The evolution of floras and faunas has been traced 
with especial attention to environment and correlation. As originally 
presented, the papers excited much interest and discussion. They 
embody the present state of knowledge and opinion concerning many 
of the fundamental problems of North American geology, and form aa 
admirable supplement to earlier treatises and manuals. 
The value of the book is greatly enhanced by the fifteen paleo- 
geographic maps by Bailey Willis which accompany the papers. 
316 pages, 8vo, cloth; $1.66 postpaid 
ADDRESS DEPARTMENT P 
THE UNIVERSITY OF CHICAGO PRESS 
CHICAGO, ILLINOIS 
