The Discovery of Radioactivity and TransmutationAlfred Romer |
Contents
BECQUEREL AND URANIUM | 7 |
HENRI BECQUEREL On the Invisible Radiations | 13 |
HENRI BECQUEREL Emission of New Radiations | 19 |
Copyright | |
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28 minutes acid actinium active deposit active matter ammonia amount barium barium chloride Becquerel bismuth body cent constant CURIE and DANNE current of air curve of decay cylinder de-emanated disintegration electric electrometer electroscope elements emanating power emitted energy equation excited activity excited radioactivity expelled experiments exponential law falling to half Frederick Soddy gives rise gram half value heat helium Henri Becquerel hydroxide intensity ionization J. J. Thomson layer long exposure mathematics maximum measured method Miss BROOKS nitrate number of particles observed obtained ordinary paper Paperbound Phil phosphorescent physical pitchblende platinum polonium precipitated present proportional quantity radiation radio radio-active particles radio-elements radioactive change radium bromide radium emanation rate of decay rayless change removal residue salt shown solution ẞ rays substance surface temperature theory thoria thorium compounds thorium emanation thorium oxide tion tube uranium uranium nitrate λι