[Agent-n. f. CONCENTRATE v.] One who or that which concentrates.

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  1.  An apparatus for concentrating solutions or other products of manufacture.

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1853.  Pharmac. Jrnl., XIII. 115. This the patentee calls a concentrator.

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1884.  Health Exhib. Catal., 60/1. Apparatus for manufacturing … Manchester concentrated manure, comprising Concentrator, Condenser, Exhauster, and Agitator.

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  2.  Fire-arms. A ring of hard paper or wire fitted inside the cartridge-case, serving to keep the shot together for some distance after discharge. Also a device for narrowing the muzzle with this object.

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1875.  ‘Stonehenge,’ Brit. Sports, I. I. xi. 54. Prepared to supply the concentrators in any numbers.

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  3.  An apparatus by which mechanical concentration of ores is performed.

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1873.  J. S. Phillips, Metallurgist’s Comp. (ed. 2), 468. The most exacting and perfect concentrators yet devised.

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