An Aqueduct Ventilator — Harper's Magazine (1860)

An Aqueduct Ventilator — Harper's Magazine (1860)

Engraving of a ventilation tower along the Croton Aqueduct. These distinctive stone towers, spaced at intervals along the 41-mile route, allowed air circulation in the underground tunnel. They became landmarks along the aqueduct trail and several survive today. From Harper's, December 1860.

Date: December 1860 Type: engraving Subjects: Croton Aqueduct, ventilator tower, stone structure Source: Harper's New Monthly Magazine / Wikimedia Commons License: Public domain