This image is among my finest and favorites depicting how glass insulators were used here in New England! Shown are electric distribution (on the shorter crossarms, especially to the left) with telephone circuits on the longer 10 and 12-pin arms. On the right atop the poles possibly are fire alarm telegraph circuits.

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Most if not all of the insulators in this photo appear to have been made of glass. The Brookfield Glass Company in New York likely was the source of most along with others that once existed elsewhere in New England. Hemingray (H.G. Co.) insulators were rather uncommon in the New England states until the Brookfield plant closed around 1923.