[f. as prec. + -ER1.] One who, or that which, exhausts.
1743. J. Ellis, Knowl. Div. Things, iv. 346. Now which of the Ancients was this Exhauster of Nature.
1792. A. Young, Trav. France, 389. Would it be no advantage to strike out one of these exhausters [wheat, rye, barley, and oats], and substitute an improver?
1853. Johnston, in Jrnl. R. Agric. Soc., XIV. I. 10. The wind … is probably a still more rapid and widely-acting exhauster of these forest lands.
1884. Health Exhib. Catal. (ed. 2), 61/1. Apparatus for manufacturing … concentrated manure, comprising Concentrator, Condenser, Exhauster, and Agitator.
b. In gas-making: (see quot. 1859.)
1841. Specif. Grafton’s Patent No. 9062. 3. The gas from this end of the retort is thereafter drawn through the pipe h directly into the exhauster.
1859. Clegg, Coal Gas, 186. Various kinds of machines have been contrived for pumping the gas in a continuous flow out of the retorts—for that is in fact the principle of the action of exhausters.
1889. Jrnl. Gas Lighting, 19 Nov., 964/2. The engine and exhauster are connected by a simple and effective flexible coupling.
