| Description | Correspondents include: James Chadwick; Sir John Cockcroft; JG Crowther; G Chain; DL Chapman; Prof JA Christiansen; Michael Clapham; J O'Neill Closs; Dr K Clusius; AW Cockburn; Dr E Cohen; Josef Cohn; G Colonetti; Dr AH Cooke; Antonio Correlli; Prof D Coster; R Courant; JH Cranshaw and Cristesen |