- Villard discovery of γ rays from radium, 179 alteration of X ray screen with time, 205 activity produced by cathode rays, 530
- Vincenti and Levi Da Zara radium emanation in spring waters, 516
- Voller variation of activity of radium with concentration, 467
- Volume of radium emanation, calculation of, 289 decrease of, of radium emanation, 290
- Walker, G. W. theory of electrometer, 90
- Walkhoff action of radium rays on skin, 216
- Wallstabe diffusion of radium emanation into liquids, 276
- Water emanation from, 510 et seq. decay of activity of emanation from, 511 et seq.
- Water-falls amount of excited activity produced at Niagara, 520 electrification produced near, 520
- Watts, Marshall atomic weight of radium, 18
Table of Contents
INDEX.
561