chEL SED 
\ op atone Le 
hele = 
* 
‘ 1 
W 
WR ED HA mf 
‘ 
~ 
MAP 
Showing Changes in Drainage 
IN THE 
GHARLES RIVER BASIN 
AND VICNITY 
F. G. CLAPP. 
SCALE 
‘ 
—---- Present Charles River Watershed. 
—---—Courses of Pre-glacial Streams. 
