‎THOMSON (J.J.)‎
‎Les rayons d'électricité positive et leur application aux analyses chimiques traduit d'après la deuxième édition anglaise par R. Fric et A. Corvisy -- PREMIERE EDITION FRANCAISE‎

‎P., Hermann, 1923, un volume in 8, broché, couverture imprimée, 10pp., 223pp., 9 PLANCHES‎

Reference : 8842

‎---- PREMIERE EDITION FRANCAISE ---- BON EXEMPLAIRE ---- "J.J. Thomson gives an account of the experiments on positive rays at the Cavendish laboratory during the years 1907 to 1913. The isotopes that Soddy had recognized could be distinguished from one another by their radiation and by the past and future history of the atoms which constituted them. It was J.J. Thomson who, in 1913, took the first steps to accomplish that task. He discovered how to sort positive ions in an electric discharge tube, and in that year he found that when neon was present, he obtained two new varieties with atomic weights of 20 and 22. They might possibly represent isotopes and F.W. Aston of the same laboratory and closely associated research assistant of Thomson, continued research on the subject for many years. In 1913 concepts of isotopes had only begun to be fruitful". (DSB XIII pp. 362/36/72) ---- "In 1913, J.J. Thomson produced a massive work on Positive rays of electricity from which important contributions to chemical analysis by others besides Aston followed". (Printing and the Mind of Man N° 386"**8842/M3‎