141 [32] 
mediately on the proposed line we have Braintree Great Pond, but 
it is twenty -three feet five inches below the summit. It will be neces- 
sary to reduce the summit level to a conformity with this source of 
supply. It discharges, per second 25.14 
Weymouth Great Pond, 507 areasy had, at this time^ been 
drawn down by mills, and discharged only - - 2.50 
Cranberry Bi'ook - - - - - 2.50 
Trout Brook on the south, estimated ^ - - 5.00 
Feet, - 35.14 
But there are other ponds in this part of the country which are 
probably at such elevation as to co-operate with these. Those already 
mentioned are capable of being raised and made reservoirs. It is 
always safe and of certain effect to raise the surface of natural reser- 
voirs. There is a rational probability that an increased pressure will 
not cause escapes to appear. 
The general aspect of the gjround was strikingly favorable to a 
canal, and the terminations of it may be easily made in deep water, 
so as to avoid waiting for tides. 
The cursory view which the Board had only an opportunity of 
taking, left an impression of the great utility of this woi^, if it can 
be effectuate*!. 
A general and thorough survey appears to be wanting, before this 
canal can be considered practicable on a scale commensurate with the 
national purpose. 
All wliich elucidations and explanations are most respectfully sub- 
Biitted, bv 
JNO. L. SULLIVAN, 
Member Board Internal ImprovemenK 
