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 Lord Rutherford's early work by Sir Edward Appleton, and some reminiscences of his time in Canada by Professors H. L. Bronson and Otto Hahn. Experiments were made with the radium as nearly as possible at this minimum activity in order to avoid possible complications due to the presence of rays. The experimental method used by the writer was not so much for the purpose of detecting the charge carried by the rays, as to measure this charge and so deduce the number of particles expelled from a known quantity of radium. Some Properties of the Rays from Radium, that the rays, emitted by a thin film of radium at its minimum activity, are initially projected with a velocity, where is the initial velocity of projection of the particles from radium C.
