Electrolysis, Boston Water Works, Massachusetts Avenue at Harrison Avenue, 30-inch pipe pitted by electrolysis (compare with Nos. 5971 and 5972), Boston, Mass., Oct. 26, 1905

Electrolysis, Boston Water Works, Massachusetts Avenue at Harrison Avenue, 30-inch pipe pitted by electrolysis (compare with Nos. 5971 and 5972), Boston, Mass., Oct. 26, 1905

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