Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Practical Ventilation As Applied to Public, Domestic, and Agricultural Structures (1850)
Practical Ventilation As Applied to Public, Domestic, and Agricultural Structures was written by Robert Scott Burn and published in 1850. It was presented as "an elucidation of plans and suggestions, of easy application, for ventilating every species of architectural structure with remarks on heating, construction of fireplaces, cure of smoky chimneys, and an appendix on the ventilation of ships, steamboats, and railway carriages." To access this book online, click here.
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