If the water-level falls below the lower float the flap closes.
Great tracts were sunk beneath the water-level of the river.
It has the advantage of showing the water-level, and the volume may be read directly.
The rain-gauge was raised about eleven feet above the water-level.
If fires run during a dry period of this kind, the fire will burn to water-level.
The water-level has not been lowered in the rock by these operations.
The water-level is about 95 feet from surface when the engine is not at work.
It is the only water-level route from the seacoast to the Inland Empire.
If, as often happens, the water-level sinks, the nests stand out higher.
So we understand that the sea changed its shore-line only when the Silurian deposits rose to the water-level.