e diaphragm fits closely against that side.
During the process of filling, the vessel is inclined; but when the weight rises to the top, it gives that side the preponderance, causing the vessel to turn on its pivots until it becomes the bottom side.
At the same time, the supply-opening is closed and that for discharge opened, while on the opposite side a contrary effect is produced.
Arrangements are provided to prevent the vessel from tilting until it is entirely filled.
The meter of M. Clement of Orleans consists of an upright cylinder divided into five compartments, each of which is caused to actuate a crank on a vertical axis common to all. This carries a compound stop-cock, which admits the water to and discharges it from each compartment when filled.
Payton's meter (C, Fig. 2970) contains two S-shaped arms, whose extremities during rotation are in close contact with each other and with the sides of the box. The arrows indicate the direction of the current.