e dam which would pressure on one of the serve as a roadway across front bearings, which are the river in place of the set in the lock masonry, bridge, and which would might be 560,000 pounds. provide an additional park, The operating machin- of great value to the ery for one of these gates,… … Upper lock gate* Charles River 4am and basin. Closing shut-off dam. THE IMPROVEMENT 07 THE CHARLES RIVER AT BOSTON, lock gate machinery,
Magnet · Construction · Device · Apparatus · Patents · Foreign matter · Scientific American · Lifting magnet · Filtering bed · Charles river · American february · Matter held · Panama canal · American supplement · American supplements
Internet Archive · Public domain (published before 1931). Free to use for anything.
