Template:POTD protected/2025-07-05
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William Rankine (5 July 1820 – 24 December 1872) was a Scottish mathematician and physicist. He was a founding contributor, with Rudolf Clausius and Lord Kelvin, to the science of thermodynamics, particularly focusing on its First Law. He developed the Rankine scale, a Fahrenheit-based equivalent to the Celsius-based Kelvin scale of temperature. This undated photograph of Rankine was taken by Thomas Annan. Photograph credit: Thomas Annan; restored by Adam Cuerden
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