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.
A Practical Treatise Upon Warming Buildings By Hot Water (1894)
A Practical Treatise Upon Warming Buildings By Hot Water was written by Charles Hood in 1894 and was an enquiry respecting ventilation, the cause and action of draughts in chimneys or flues, and the laws relating to combustion. To access this book online, click here.
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