Alan Cottrell
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Sir Alan Howard Cottrell, FRS was an English metallurgist and physicist. He was also former Chief Scientific Advisor to the UK Government and vice-chancellor of Cambridge University 1977–1979.
Solvay Conference on Physics in Brussels 1951. Left to right, sitting: Crussaro, N.P. Allen, Cauchois, Borelius, Bragg, Moller, Sietz, Hollomon, Frank; middle row: Rathenau,(nl) Koster, Rudberg,(sv), Flamache, Goche, Groven, Orowan, Burgers, Shockley, Guinier, C.S. Smith, Dehlinger, Laval, Henriot; top row: Gaspart, Lomer, Cottrell, Homes, Curien