- Radium E effect of temperature on, 401 connection of, with β ray activity active deposit, 403, 400 connection with radio-lead, 413
- Radium F variation of activity due to, 398 effect of temperature on, 401 separation of, on bismuth plate, 402 connection with active deposit, 403 variation of activity of, over long periods of time, 407 presence in old radium, 409 effect of, on activity of old radium, 409 presence in pitchblende, 410 connection with radio-tellurium, 411 connection with polonium, 411, 412 connection with radio-lead, 413
- Rain radio-activity of, 505 decay of activity of, 506
- Ramsay, Sir W. amount of helium in thorianite, 486
- Ramsay and Collie spectrum of emanation, 292
Table of Contents
INDEX.
555