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Adams National Historical Park
Bookstore
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Did You Know?
The term "Cold Blast" refers to air being drawn directly from the outside atmosphere and entered into a furnace by its bellows machinery. A "Hot Blast" system pre-heated the air before entry, a more efficient means of increasing temperature in a furnace. Hopewell Furnace was a cold blast furnace.
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Last Updated: May 16, 2007 at 16:35 EST |