Class C - Electron diffraction

C3-8 consist of the contents of a folder labelled 'Potential Drop in Dark Space. October 1923-January 1924'. For ease of reference, the material has been subdivided and put into separate folders. Thomson's original ordering of the papers has been retained.
C 10-22 consist of the contents of folder labelled 'Calculations for Scattering of positive rays in hydrogen, argon and helium'. The order of the papers remains unchanged but the original folder has been discarded.