XCV. The are spectra of silver and copper

Abstract

1. Experiments are described on the ultra-violet spectra of low-voltage arcs in silver and in copper vapour. A table of the lines obtained is given. 2. The line absorption of copper vapour has been Eound experimentally. Ten lines in the ultra-violet are absorbed. The various combinations calculated from these data are tabulated. No series is evident in these lines. 3. Further terms, are calculated from the low-voltage arc lines, using a term md ₁=51105·5.