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 Text visible in image: AN AQUEDUCT VENTILATOR.

Source: Harper's New Monthly Magazine / Wikimedia Commons License: Public domain

— NOTE: This entry was generated from photo metadata using AI vision analysis and automated tools. Details may contain errors. Refer to the original source for authoritative information.