Obs. Mining. Also bonney. [? Cf. BUNNY, a swelling.] (See quots.)

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1671.  Phil. Trans., No. 69. 2098, cited in Chambers, Cycl. Supp. (1753), who says, Bonny, a name given by our miners to a bed of ore not forming a vein, nor communicating with any other vein…. They differ from the squats only in being round beds of ore, whereas those are flat.

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1721.  Bailey, Bonny, (with miners) is a distinct bed of Oar, that communicates with no Vein. [Hence in later Dicts.]

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