Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, view of Farm Pond gate house foundations, looking towards northeast corner of coffer dam.

Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, view of Farm Pond gate house foundations, looking towards northeast corner of coffer dam.

Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, view of Farm Pond gate house foundations, showing west end of coffer dam.

Boston water works, Sudbury River Conduit, Nov. 6th, 1876, Division 1, Section 1, view of Farm Pond gate house foundations, showing west end of coffer dam.

Boston water works, Sudbury River Conduit, 1876, Dam no III, north end of Dam, showing foundations of gate house, looking north.

Boston water works, Sudbury River Conduit, 1876, Dam no. III, north end of Dam, looking south towards Hauer's(?).

Boston water works, Sudbury River Conduit, 1876, Dam II, view of foundations, looking west.

Boston water works, Sudbury River Conduit, 1876, Dam I, view showing location of dam and bridges on Winter Street over Sudbury River.

Boston water works, Sudbury River Conduit, Sept. 1876, Dam III, Rubble masonry foundations, southeast corner of gate house.

Boston water works, Sudbury River Conduit, Aug. 1876, Dam no. 1, Pairing below overflow, south side of river.

Boston water works, Sudbury River Conduit, 1876, Dam no. 1, view of foundations, looking towards Frasts(?).

Current testing apparatus.

Sudbury River Conduit, Nov. 6, 1876, Div. I Sec. I, current meter.

Sudbury River Conduit, Nov. 6, 1876, ditch in woods for temporary ... between Farm Pond and Lake Schituate showing apparatus for rating current meter.

Sudbury River Conduit, Nov. 6, 1876, ditch in woods for temporary ... between Farm Pond and Lake Schituate showing apparatus for rating current meter.

Boston Water works, Sudbury River Conduit, Nov. 6, 1876, automatic apparatus for recording heights of water at dam on Sudbury River.

Sudbury River Conduit, Nov. 6, 1876, wooden dam on Sudbury River.

Boston Water works, Sudbury River Conduit, Nov. 6, 1876, south end of wooden dam on Sudbury River showing R.R. bridge and small bridge used for taking experiments with current water.

Boston water works, Sudbury River Conduit, section 10, Waban Valley Bridge, view looking east shows foundations.

Boston water works, Sudbury River Conduit, Section 10, Waban Valley bridge, view looking west shows pier no. 2 and the pile foundations for pier no. 3.

Sudbury River Conduit, section #3 near Dametto orchard looking west.

Sudbury River Conduit, section 1, coffer dam at farm pond looking west.

Arch at Ellis St.(?).

Chicago waterworks, North Side.

North side waterworks.

North side waterworks.

West side waterworks [interior views showing pumping machinery].

North side waterworks.

The Crib.

Crib, Chicago waterworks.