Other important places on the Net to visit.

The Math Forum has part of our book, "Math to Build On", on their site. Math to Build On

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.
Dan Holohan's Site

The National Building Museum has a fine web site that you ought to see.
National Building Museum

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CTP Address