Special thanks to George Peteya, P.E., of Slant/Fin for sharing this circa-1955 Sarcotherm Installation and Service Manual for Modulating Outdoor-Indoor Controls (Sarcotherm Type STA-1 and Type STA-1D). As George wrote, "It's probably the last surviving copy of the first outdoor-air reset controller."
This chapter on hot water heating systems and piping was prepared by Professor F.E. Giesecke (Director of Texas Engineering Experiment Station in TX) for the The American...
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.
Brian Roberts & Paul Yunnie compiled this document that contains beautiful vintage advertisements and illustrations of radiators from the mid to late 1800s and early 1900...