William L. Pierce Heating Contractor . Haynes Modulated Vapor Heating

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From collection Mount Desert Island Historical Society - Fred L. Savage Collection

Two blueprints for manufacturer of heating equipment demonstrating the system.

Date/Date Range

1917

Condition Date

06/23/2011

Credit Line

Louis Gerrish, Jr.

Catalogued Date

06/23/2011

Last Updated

01/03/2013