Seaham Colliery, County Durham, England, showing the head gear above the shaft, and work in an active coal seam. The central vignettes show two models of miner's lamp, the Davy, left, which was the more popular, and the Clanny. Below, a boy is operating the ventillating furnace which created a draught in the workings, so preventing a build up of fire-damp (methane). On the right a pit pony pulling wagons has just passed through a trap door, another device to control ventillation. Engraving from 'The Graphic' (London, 28 January 1871).

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