Raoul-Pierre Pictet (4 April 1846 - 27 July 1929) was a Swiss physicist, who first created liquid oxygen. 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.

1846 births | 1929 deaths | Natives of Geneva | Swiss physicists | Raoul Pictet