Electrolysis, Porter Square, interior of positive section of 48-inch insulation joint No. 4 after 1 year, 8 months of service, showing electrolytic pittings, Cambridge, Mass., Sep. 28, 1906

Electrolysis, Porter Square, interior of positive section of 48-inch insulation joint No. 4 after 1 year, 8 months of service, showing electrolytic pittings, Cambridge, Mass., Sep. 28, 1906

Item Information