Here is an excellent article on the history of heating and radiators written by Alfred King, who is one of the great heating engineers of the last century. This was an article that I stumbled across while doing a Google search on him. It has some great history that anyone interested in steam or hot water heating will enjoy. These individuals he mentions are some of the biggest names in heating history. As well as the origin of the American Radiator Co.
Where would we be today without Google! Quite simply the greatest learning tool ever devised.