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Hoosac Tunnel Photographs
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Nitro-glycerin factory, north view picture
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West portal: steam shovel
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Fire at central shaft, 1867, when T.G. Mallory rescued miners
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Looking south: shaft buildings, machine shop, etc.
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Prof. Mowbray's nitro-glycerin works
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North Adams 1872
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Interior view
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Interior view
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East End: completed
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East End: under construction
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East end: miners going in
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North Adams 1872
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