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.
Limitations in Heat Output from Radiant Panels
This document about the Limitations in Heat Output from Radiant Panels is from LaTart and Hutchinson of the Revere Brass and Copper Company, written in January 1949. Thanks to Jim Walls for finding and scanning this one.
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