Upham.l 38 [March 15, 
Ten to twenty feet farther northeast, mainly S. 2o° E., but 
with many intersecthig striae bearing due S 
Again, thirty to forty feet east of the last, excellent striae bear 
S. 70^ E. 
Next, from ten to twenty feet still farther east, the striae, also 
excellent as to their extent and depth, bear mainly in two sets, 
8. 80° to 85° E. and N. 85° E. Here and there, however, 
straight striae cross these in various courses to N. 60° E. Others 
curve from an eastward to a north -northeastward course in their 
length of three to four inches. 
Fifteen to twenty feet still onward to the east, striae on closely 
a Ijoining spots bear res2)ectively S. 60° E. and S. 80° E. 
Finally, from twenty-five to forty feet yet farther east, upon an 
admirably glaciated surface from ten to fifteen feet across, 
the striae all bear S. 30° E. ; except that in one place, for two 
or three feet, these are intersected by a few short, deep furrows, 
bearing S. 80° E. Nearly the whole of this surface was thinly 
covered by drift while the deflected S. 80° E. glacial current 
swept over it. 
All these observations of striae near Willow Avenue are on the 
upper part of the northern or stoss side of this slightly projecting 
diabase ledge, where no tooographic features of this knoll or the 
surrounding land coidd tend to turn the glacial currents from 
their normal courses due to the varying pressure of the ice-sheet. 
West Somercille. 
Four to five rods west of the Powder House, on a poition of 
the rock uncovered in grading for the new paik, mostly S. 25° E., 
crossed by a few others, S. 15° E. 
About ten rods south of the Powder House, S. 25° E. 
Liberty Avenue, near Francesca Avenue, S. 40° E. 
Kidder Avenue, close west of Liberty Avenue, also S. 40° E. 
Kidder Avenue, south sidewalk, near Elm street, S. 25° to 
30° E. 
Summit Street, two places, S. 30° E. and S. 25° E. 
liillingham Street, northwest sidewalk, nearly opposite Summit 
Street, S. 30° E. ; and about four rods west of the last, S. 25° E. 
These and the last three places previously noted are on very 
small rock exposures, even with the graded surface. 
