Raoul Pictet

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Raoul-Pierre Pictet
Pictet Raoul.jpg
Raoul-Pierre Pictet
Born 4 April 1846 (1846-04-04)
Died 27 July 1929(1929-07-27) (aged 83)
Nationality Swiss
Known for Liquid nitrogen
Awards Davy Medal (1878)
Scientific career
Fields Physics
Institutions University of Geneva
Pictet Raoul signature.jpg

Raoul-Pierre Pictet (4 April 1846 – 27 July 1929) was a Swiss physicist. He was the first person to liquefy nitrogen.[1]


Pictet was born in Geneva. He served as professor in the university of that city. He devoted himself largely to problems involving the production of low temperatures and the liquefaction and solidification of gases.[2]

On December 22, 1877, the Academy of Sciences in Paris received a telegram from Pictet in Geneva reading as follows: Oxygen liquefied to-day under 320 atmospheres and 140 degrees of cold by combined use of sulfurous and carbonic acid. This announcement was almost simultaneous with that of Cailletet who had liquefied oxygen by a completely different process.[3][3]

Pictet died in Paris in 1929.[4]


See also[edit]


  1. ^ Pictet, Raoul (1896). "Die Fortschritte Der Physik". 51 (1-2): 234. 
  2. ^ For biographical details, see Sloan, T. O'Connor (1920). Liquid Air and the Liquefaction of Gases. New York: Norman W. Henley. pp. 152–171. 
  3. ^ a b Matricon, Jean; Waysand, G. (2003). The Cold Wars: A History of Superconductivity. Rutgers University Press. pp. 6–. ISBN 978-0-8135-3295-0. 
  4. ^ Arabatzis, Theodore; Renn, Jürgen; Simões, Ana (19 May 2015). Relocating the History of Science: Essays in Honor of Kostas Gavroglu. Springer. pp. 9–. ISBN 978-3-319-14553-2.