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 Manual of Steam and Hot-Water Heating (1911)
A Practical Manual of Steam and Hot-Water Heating was written by Edward Richmond Pierce in 1911. This will give you a glimpse into what heating was like during that time period. According to the author's preface, "For about a quarter of a century the writer of these pages has been connected with those who manufacture and sell boilers and radiators for steam and hot-water heating. During this long period it has been his daily duty and privilege to answer the questions of architects, engineers, steam-fitters and house-owners in regard to every phase of the house-heating industry."
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