FEB 3 -1908 
The Ohio lA^aturalist, 
PUBLISHED BY 
The Biological Club of the Ohio State University. 
Volume VIII. JANUARY. 1908. No. 3 
TABLE OF CONTENTS 
SCHEFFF.I. —An Esker Group South of Dayton, Ohio.231 
Jackson —Notes on the Aphididae.243 
New Books. ...... . 250 
Natural History Survey.250 
AN ESKER GROUP SOUTH OF DAYTON, OHIO . 1 
Earl R. Scheffel 
Contents. 
Introduction. 
General Discussion of Eskers. 
Preliminary Description of Region. 
Bearing on Archaeology. 
Topographic Relations. 
Theories of Origin. 
Detailed Description of Eskers. 
Kame Area to the West of Eskers. 
Studies. 
Proximity of Eskers. 
Height of Eskers. 
Reticulation. 
Knolls. 
Economic Importance. 
Area to the East. 
Conclusion and Summary 
Altitude of These Deposits. 
Composition of Eskers. 
Rock Weathering. 
Crest-Lines. 
LIBRaR 
NEW Yet 
BOTANIC. 
garden 
Introduction. This paper has for its object the discussion of 
an esker group 2 south of Dayton, Ohio ; 3 which group constitutes 
a part of the first or outer moraine of the Miami Lobe of the 
Late Wisconsin ice where it forms the east bluff of the Great 
Miami River south of Dayton.^ 
1. Given before the Ohio Academy of Science, Nov. 30, 1907, at Oxford. O., repre¬ 
senting work performed under the direction of Professor Frank Carney as 
partial requirement for the Master's Degree. 
2. F. G. Clapp, Jour, of Geol., Vol. XII, (1904), pp. 203-210. 
.3, The writer’s attention was first called to the group the past year under the name 
"Morainic Ridges,” by Professor W. B. Werthner, of ’Steele High School, 
located in the city mentioned. Professor Werthner stated that Professor 
August F. Foerste of the same school and himself had spent some time 
together in the study of this region, but that the field was still clear for inves¬ 
tigation and publication. Professor Foerste later made practically the same 
statement. The writer is indebted to both of these gentlemen for their cour¬ 
tesy. He also wishes to thank his instructor Professor Carney, for going 
over the field with him and taking t.he several excellent photographs illus¬ 
trating this article. 
4. F. Leverett, Monograph XLI, U. S. Geol. Surv., (1902), p. 355. 
T. C. Chamberlin, 3rd Annual Report, U. S. Geol. Surv.. (1881-82), p. 334. 
