[AIR- 7.]

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  1.  The AIR-CHAMBER of a fire-engine or life-boat.

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1838.  Poe, Pym, Wks. 1864, IV. 20. Fitted … with air-boxes in the manner of some life-boats.

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1857.  Tomes, Amer. in Japan, xiv. 316. These engines … are deficient in the important part of the machine called the air-box.

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  2.  Mining: ‘A square wooden tube used to convey air into the face of a single drift, or shaft, in sinking.’ Northumb. & Durh. Coal-trade Terms, 1851.

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