440 
Frank Carney 
sixteen feet of gravel. Gravel also underlies the clay. The well 
of D. W. Rowley across the highway has a similar record. 
Obviously there are apt to be several lines of discrepancy in 
these well records because in all cases they were given the writer 
from memory. I place slight value on the number of feet of 
clay or other material alleged in the wells. The constant report, 
however, of an exceedingly hard horizon is suggestive of an indur- 
ated drift which may imply much antiquity. 
ACKNOWLEDGMENTS 
This investigation was begun some years ago at the suggestion 
of Professor R. S. Tarr to whom I am deeply obligated for sus- 
taine i encouragement and invaluable aid. Doctor J. B. Wood- 
worth of Harvard kindly read the manuscript, making many 
important suggestions; and Professor EarlR. Scheffel of Lawrence 
college has rendered me great service in reading the proof. 
Plate XII. A Pleistocene Map of the Moravia Sheet. 
The overlay gives hypothetical retreatal positions of the ice-front as suggested 
by the moraines and their valley loops. 
The direction of striae represent in each case the average of many readings. 
The eskers are numbered, i to 9; and the deltas are marked by the letters, A to J. 
In all other particulars the legend is indicated on the margin of the plate. 
