The Origin of the British Thermal Unit
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Author
Thomas Tredgold
Published
July 21, 2009
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Here are a few pages from Thomas Tredgold's 1824 book, The Principles
of Warming and Ventilating Public Buildings, etc. This is the first
text ever written about heating and ventilating. In it, Mr. Tredgold
writes about a new way of measuring heat, which evolved into what we
today call the British thermal unit.
