Jarecki Radiators (1890)
Here are ratings for the Erie radiator from Jarecki Mfg Co Ltd. They were based in Erie, PA and their radiators appeared in issues of Domestic Engineering in the 1890s.
How to Lock Out Air: The Heat Thief
Here is a wonderful little book from Hoffman Specialty from 1927 called How To Lock Out Air: The Heat Thief. It includes some great pictures. It makes the case for steam heating systems, shares how a one-pipe steam heating system operates, how to vacuumize a one-pipe steam heating system, why Hoffman No. 2 vacuum valves save one-third of your fuel, how Hoffman No. 2 vacuum valves pay for themselves in less than 2 years, as well as some customer testimonials. Special thanks to Alex Marx for doing the scan.
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