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009752

Mine survey in progress. When this was done, rails were lifted and as much metal as possible was removed so as to minimise any influence on the compass. From 'Underground Life; or, Mines and Miners' by Louis Simonin (London, 1869). Wood engraving.

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Filename
009752.jpg
Copyright
Irish Photo Archive
Image Size
3054x2042 / 1.5MB
Contained in galleries
Mine survey in progress. When this was done, rails were lifted and as much metal as possible was removed so as to minimise any influence on the compass. From 'Underground Life; or, Mines and Miners' by Louis Simonin (London, 1869). Wood engraving.