Definition of "water-meter" [water-meter]

• An instrument that measures the quantity of water that passes through it, as a gas-meter measures gas. There are various contrivances for this purpose. See cuts on following page. (noun)
• An instrument for determining the amount of water evaporated in a given time, as from a steam-boiler. (noun)

The Century Dictionary (Public Domain)

• "Meanwhile the main valve at the bottom of the water-meter is opened, such water as has accumulated from tests in preceding experiments is allowed to run out, and the valve is closed after the can is empty."
• "The voltmeter and mil-ammeter were read every few minutes, the water collected in the water-meter, carefully weighed, and the temperature differences as measured on the two mercury thermometers were recorded every 4 minutes."
• "At the left of the observer's platform is a platform scale supporting the water-meter, with plug valve and handle conveniently placed for emptying the meter."