Electrolysis, Cambridge Water Works, Huron Avenue at Appleton Street, 40-inch steel pipe pitted by electrolysis; patches cover holes and pits made by electrolysis (compare with No. 5558), Cambridge, Mass., Jul. 30, 1904

Electrolysis, Cambridge Water Works, Huron Avenue at Appleton Street, 40-inch steel pipe pitted by electrolysis; patches cover holes and pits made by electrolysis (compare with No. 5558), Cambridge, Mass., Jul. 30, 1904

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