Weston Aqueduct, Section 9, 7 1/2-foot diameter steel pipe in trench, visit by members of New England Water Works Association, Wayland, Mass., Sep. 12, 1902

Weston Aqueduct, Section 9, 7 1/2-foot diameter steel pipe in trench, visit by members of New England Water Works Association, Wayland, Mass., Sep. 12, 1902

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