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. The Bakeries lecture, author described some experiments that were made to determine the charge carried by particles (electron). About half milligram of radium bromide was dissolved in water, and spread uniformly over a metal plate and evaporated to dryness. With a plate of 20 sq. cm. in area, the absorption of the rays in the thin film of radium bromide is negligible. Since the film of radium bromide is so thin that all the particles escape from its surface, it is easy to deduce from the observed charge from a known weight of radium the total number of particles expelled per second from one gram of radium bromide.
