68 Dr. — ‘accouirit of the springs and wells in Boston. 
REFERENCES TO FIG. XI. 
a A pond of fresh water several miles distant from Boston. 
6666 Strata of earth, gravel, clay and gravel. 
e Salt water between Boston and Cambridge. 
d Beacon Hill. | 
e Part of Long Wharf. 
i) Wells of water, communicating with veins of gravel or sand at 
different depths, 
--- Small veins of sand or gravel, which convey water from larger 
yeins to the surface of ee earth, and break out in springs. 
os _ chiefy : slate. | 
Sey ke SR ge 
a 
