Raoul Pictet
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Raoul-Pierre Pictet (4 April 1846 - 27 July 1929) was a Swiss physicist, who first created liquid nitrogen. He was born in Geneva.
On December 22, 1877, the Academy of Sciences in Paris received a telegram from a physicist in Geneva. It was from Raoul Pictet and read Oxygen liquefied to-day under 320 atmospheres and 140 degrees of cold by combined use of sulfurous and carbonic acid.The announcement was almost simultaneous with that of Cailletet who also liquefied oxygen by a completely different process.
Pictet died in Paris in 1929.
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