Lester Germer

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Lester Halbert Germer (1896 – 1971) was an American physicist. With Clinton Davisson, he proved the wave-particle duality of matter in the Davisson-Germer experiment, which was important to the development of the electron microscope. He also studied thermionics, erosion of metals, and contact physics.

Germer was a fighter pilot in World War I.

Germer worked at Bell Labs in New Jersey.

In 1945 (at the age of 49), Germer launched a side career as a rock climber. He climbed widely around the Northeast United States, and especially at New York's Shawangunks. Although the Appalachian Mountain Club was dominant in the area at the time, and strictly regulated rock climbing, Lester was never associated with the club, and found himself in conflict with the leading climber in the area Hans Kraus, who was head of the AMC's Safety Committee. He was once turned down for climbing certification with the comment "Likes people too much and is too enthusiastic." Lester was known for being generous and friendly. He was once called "A one man climbing school."

In 1971, one week before his 75th birthday, Lester Germer died of a massive heart attack while lead climbing a rock climb at the Gunks (Eyebrow, 5.6). Until that moment, Lester had a twenty six year perfect safety record in rock climbing; he had never even taken a leader fall.