systematically very soon after that at Lowell, and could furnish about
fourteen thousand horse power during the usual working hours, but
the works are so arranged that part of the power is not available at
present.

At Manchester, New Hampshire, the present works were commenced in 1835.
The Merrimack River at this point has a fall of about fifty-two feet,
and furnishes, at a minimum, about ten thousand horse power during the
usual working hours.

At Lawrence, Massachusetts, the Essex Co. built a dam across the
Merrimack River, commencing in 1845, and making a fall of about
twenty-eight feet, and a minimum power, during the usual working hours,
of about ten thousand horse power.

At Holyoke, Massachusetts, the Hadley Falls Co. commenced their works
about 1845, for developing the power of the Connecticut River at that
point, where there is a fall of about fifty feet, and at a minimum,
about seventeen thousand horse power during the usual working hours.

At Lewiston, Maine, the fall in the Androscoggin River is about fifty
feet; its systematic development was commenced about 1845, and with the
improvement of the large natural reservoirs at the head waters of the
river, now in progress, it is expected that a minimum power, during
the usual working hours, of about eleven thousand horse power will be
obtained.

At Birmingham, Connecticut, the Housatonic Water Co. have developed the
water power of the Housatonic River by a dam, giving twenty-two feet
fall, furnishing at a minimum about one thousand horse power during the