Template:Selected anniversaries/May 13
From Gnomon Chronicles
1713: Mathematician, astronomer, and geophysicist Alexis Clairaut born. Clairaut's work will help to establish the validity of the principles and results that Sir Isaac Newton had outlined in the Principia of 1687.
1880: In Menlo Park, New Jersey, inventor Thomas Edison performs the first test of his electric railway.
1929: Electrical engineer and inventor Arthur Scherbius dies. Scherbius invented and patented the famous mechanical cipher Enigma machine.
1937: Writer Roger Zelazny born. Zelazny will win the Nebula award three times, and the Hugo award six times.
1974: Physicist and chemist Marguerite Perey dies. Perey discovered the element francium while purifying samples of lanthanum.
