Boston, MA, c.1900. Park Street Subway Station with Transit Car, CD 140 Jumbo Insulators

By Joe Maurath, Jr.; posted March 20, 2022

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Long ago (I do not know when) these CD 140 insulators and their heavy DC cables were removed. However the "crossarms" (with their pins) extending from the building wall remain to this day throughout the length of the station and beyond; heading west along this route.

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