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1873 - Old Forge Coal Mines

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94 ANNUAL REPORT OF THE<br />

90 yards of a, mining run in 5 feet of coal. This collieiy is well managed<br />

in all its details.<br />

Ventilation is produced by a 10-horse power steam fan ; the slope beingused<br />

as an intake and the air conducted in spits into and through the working<br />

places and returned to the fan upcast with satisfactory results. The<br />

mine generates fire-damp largely.<br />

Colliery Log.—Outside temperature, 44°<br />

;<br />

inside temperature, 60°<br />

;<br />

difference,<br />

16°—danger; outside barometer, 29 T §oths ; inside barometer, 29<br />

inches ;<br />

difference, T §

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