John_Cunningham_McLennan

John Cunningham McLennan

John Cunningham McLennan

Canadian physicist

Sir John Cunningham McLennan, KBE FRS FRSC[1] (October 14, 1867 – October 9, 1935) was a Canadian physicist.

Quick Facts Born, Died ...

Born in Ingersoll, Ontario, the son of David McLennan and Barbara Cunningham, he was the director of the physics laboratory at the University of Toronto from 1906 until 1932.

McLennan was elected a Fellow of the Royal Society in 1915.[2] McLennan delivered the Guthrie lecture to the Physical Society in 1918. With his graduate student, Gordon Merritt Shrum, he built a helium liquefier at the University of Toronto. In 1923, they became the second group of physicists in the world to successfully produce liquid helium, 15 years after Heike Kammerlingh Onnes.[3] In 1926, McLennan was awarded the Royal Society of Canada's Flavelle Medal and in 1927 a Royal Medal.

He died in 1935 near Abbeville in France on a train from Paris to London[2] of a heart attack. He is buried beside his wife in Stow of Wedale, Scotland.[4]


References

  1. [1]
    Eve, A. S. (1935). "Sir John Cunningham McLennan. 1867-1935". Obituary Notices of Fellows of the Royal Society. 1 (4): 577–583. doi:10.1098/rsbm.1935.0022. JSTOR 768989.
  2. [2]
    "Directory of Fellows of the Royal Society". Archived from the original on 8 October 2021. Retrieved 24 August 2019.
  3. [3]
    Radebaugh, R. (2007). "Historical Summary of Cryogenic Activity Prior to 1950". In Timmerhaus, K. D.; Reed, R.P. (eds.). Cryogenic Engineering - Fifty Years of Progress. New York: Springer. ISBN 978-0-387-46896-9.
  4. [4]
    "Biography McLENNAN, Sir JOHN CUNNINGHAM". Retrieved 24 August 2019.
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