Correspondence between Sir Lawrence Bragg and others including John Nye Most of the letters in the folder relate to Bragg's collaboration with Nye on the bubble model of crystal dislocations, particularly concerning copies of the photographs of the experiment. The folder includes some letters to Bragg that are not from Nye: two letters from February 1946 concerning a sample of soap solution [presumably for use in the experiments] and a letter from E R Davies, director of research at Kodak, concerning the filming of the bubble model. 1946-1960