Description:

James Chadwick's toolbox was an old Rhodian cigarette carton in which he kept apparatus used in his scientific work, particularly during his discovery of the neutron. Chadwick (1891-1974) used the pieces of paraffin wax in his neutron detector, while the silver and aluminium foils of different thicknesses were used as barriers to help assess the strength of radiation. Chadwick's theories and experiments helped to rewrite existing beliefs concerning what was contained in the nucleus of an atom.