ABSTRACT
This chapter includes early papers written in New Zealand, at the Cavendish Laboratory and during the Montreal period (1894-1906), as well as an introduction to Rutherford's early work by Sir Edward Appleton, and some reminiscences of his time in Canada by Professors H. L. Bronson and Otto Hahn. Rutherford and Barnes, Phil. Mag., February 1904 showed that the emission of heat from radium was intimately connected with its radioactivity, and was divided between the different radioactive products of radium in proportion to their ray activity. These results indicated that the heating effect of radium and its radioactive products was mainly due to the bombardment of the active matter by the stream of particles which are continuously thrown off. One of us has calculated that the energy of the particles emitted from radium is only a small percentage of the energy of the particles.
