Raoul Pictet
Swiss physicist
Raoul-Pierre Pictet was a Swiss physicist. Pictet is co-credited with French scientist Louis-Paul Cailletet as the first to produce liquid oxygen in 1877. Wikipedia
Born: April 4, 1846, Geneva, Switzerland
Died: July 27, 1929 (age 83 years), Paris, France
Award: Davy Medal (1878)