Other important places on the Net to visit.
Dan Holohan is a fine writer of magazine articles and books. He says he specializes
in hydronic heat, but his writing skills take you beyond such a specialty. He
is considered the guru of steam heating by a great many people. Bookmark his site
when you get there because you will want to return often for the other stuff.
The National Building Museum has a fine web site that you ought to see.