Boston, MA 1901. View of CD 140 Jumbo Insulators In Service, Boylston Station.

By Joe Maurath, Jr.; posted November 5, 2019

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Another look at these great insulators in their day with a prominent "Boylston Station" sign that greeted passengers to this now-historic subway system. Click "Previous" for three more individual images from 1901 clearly showing these insulators.