- Radium C radiations from, 381 analysis of β ray curves of, 381 et seq. analysis of α ray curves of, 386 et seq. effect of temperature on, 390 activity supplied by, 394 et seq. heating effect of, 425 use of, as a source of β rays, 435 explosive nature of change in, 456 magnetic deflection of rays from, 543 velocity and value of e/m for rays from, 544
- Radium D origin of name of, 376 connection of, with active deposit, 403 period of transformation of, 406 effect of, on variation of activity, 407 presence in old radium, 408 effect of, on activity of old radium, 409 presence in pitchblende, 410 connection with radio-lead, 413 amount of, in 1 ton of uranium, 454
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