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Detroit River Tunnel, Detroit, Mich.

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Detroit River Tunnel, Detroit, Mich.

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Approach and Entrance to Detroit River Tunnel, Detroit, Mich.

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Entrance to Detroit River Tunnel, Detroit, Mich.

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Electric Engine used for Hauling Trains through Tunnel under Detroit River, Detroit, Mich.

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Electric Engine and Power House of Detroit River Tunnel, Detroit, Mich.

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Detroit River Tunnel, Detroit, Mich.

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East Portal of Twin Tubes, Detroit, River Tunnel, Canadian Side, through which Michigan Central trains run, Detroit, Mich.

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East Portal, Michigan Central R. R. Tunnel, from Canadian Side.

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Interior of the Detroit River Tunnel, Detroit, Mich.

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West Portal of Twin Tubes, Detroit, River Tunnel, American Side, through which Michigan Central trains run, Detroit, Mich.