Wood, the Engineer-in-Chief of the Waterworks Ca., we have seen one of Deacon's Difforentiating Waste Water Meters at work. Mr. Wood introduced the system into Shanghai for the purpose of detection, underground leaks; and we were so muc} struck with the extreme delicacy and sensitiveness of the instrument, that we feel sure a short description will be interesting to some of our readers.
Upon the main supplying each district a waste water meter is placed and the valves so arranged that the whole of the water supplying that district pastes through the meter. When no water is passing, the counterbalance weight holds the carriage and its pencil at the top of the stroke,
Text read from the printed page and cleaned; old type leaves the occasional error.