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Thomas Fowler (inventor)
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<p>Thomas Fowler (1777 – 31 March 1843) was an <a href="/facts/England/U9mE5bGL">English</a> <a href="/facts/Inventor/P3LdUHBY">inventor</a> whose most notable invention was the <a href="/facts/Thermosiphon/2b19pP49">thermosiphon</a> which formed the basis of early hot water <a href="/facts/Central_heating/GsYBDLmn">central heating</a> systems. He also designed and built an early <a href="/facts/Mechanical_calculator/As7HE5dB">mechanical calculator</a>. </p>