Perfex Series 155 Magic Dial Thermostat
Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Doody System of Vapor Heating
This booklet about the Doody System of Vapor Heating dates back to 1916. Thanks to Brian Reynolds and Frank "Steamhead" Wilsey for sharing this rare information with us. We'd be interested in knowing if anyone in the Boston/Providence area has seen a Doody system.
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