CONTENTS. 
JULY NUMBER. 
Sketch of the Life and Work of Charles Baker Adams 
Henry M. Seeley. [ Portrait] I 
A Small Esker in Western New York. Frank M. Comstock. 
[Plates II-III] 12 
The Origin of Ocean Basins on the Planetessimal Hypothe- 
sis. T. C. Chamberlin 14 
The Devonian Era in the Ohio Basin. Edward Claypole. 
[Plates IV-X.] 15 
The Hanging Valleys of Georgetown, Colorado. W. O. Cros- 
by. [Plates XI-XIII] 42 
Editorial Comment. 
The Quantitative Classification of .Igneous Rocks 48 
Review of Recent Geological Literature. 
On Batrachian and other footprints from the Coal Measures 
of Joggens, Nova Scotia. G. F. Matthezvs 54 
Monthly Authors' Catalogue of American Geological Liter- 
ature 55 
Correspondence. 
Bituminous and Asphalt Rocks of the United States. G. C. 
Broadhead 60 
Personal and Scientific News. 
Dr. Robert N. Hartman, asphyxiated in the chemical labora- 
tory, Colorado School of Mines, 61 ; Death of Dr. J. P. Lesley, 
63 ; Survey of the Bradshaw Mountain district in Arizona, 62 ; 
Field Methods in Water Analysis, 62; New York Academy 
of Sciences, Report of May meeting 63 
AUGUST NUMBER. 
Variolitic Pillow-Lava from Newfoundland. [Plates XIV- 
XV.] Reginald A Daly. . 65 
The Devonian Era in the Ohio Basin. Part I — Continued. 
[Plates XVI-XVIL] Edward W. Claypole 79 
Glacial Lake Nicolet and the Portage between the Fox and 
Wisconsin Rivers. Warren Upham 105 
On Some Recent Literature Bearing on the Laramie Form- 
ation. O. P. Hay t r<; 
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