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Charles-Édouard Guillaume
1861 - 1938
Charles Édouard Guillaume (1861 – 1938) was a Swiss physicist who received the Nobel Prize in Physics in 1920 for studies of ferronickel alloys that culminated in the discovery of invar (a nickel–steel alloy).
"Charles Édouard Guillaume." Encyclopaedia Britannica. Encyclopaedia Britannica Online Academic Edition. Encyclopædia Britannica Inc., 2014. Web. 17 Oct. 2014. <http://www.britannica.com/EBchecked/topic/248688/Charles-Edouard-Guillaume>.