Here is a Capitol Boilers and Radiators catalog from the United States Radiator Corporation, printed in 1934. It features the Capitol Red Top Boilers (A Series, B Series, and C Series), Capitol Black Top Boilers, Capitol Oil Burning Boilers, Capitol Round Boilers, Capitol Radiators, Capitol Fincast Radiators, and Capitol Enclosures.
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...