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. The present paper contains an account of further experiments upon the variation of activity of the different products with time, and of the isolation of a new product. The chapter shows that the active deposit contained two distinct substances, called Radium D and Radium E, the latter of which arose from the transformation of the former. The product radium F is deposited on a bismuth plate from a solution of the active deposit. The surface of such a plate, which has been left for some hours in the solution, becomes strongly active. The chapter shows that the rays from radio-tellurium and radium F were identical in their power of penetrating matter.
