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.
American Steam and Hot-Water Heating Practice (1895)
American Steam and Hot-Water Heating Practice was written in 1895 and includes descriptions of hot-water, steam-heating, and ventilating installations in the different classes of buildings in the United States. To access this book online, click here.
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Jarecki Radiators (1890)
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