Sentence Examples


  • Some part, however, seems to be derived from Thorium, And H.
  • Bumstead (60) Finds That With Longer Exposure Of The Wire The Relative Importance Of The Thorium Emanation Increases.
  • With Three Hours' Exposure He Found The Thorium Emanation Only From 3 To 5% Of The Whole, But With 12 Hours' Exposure The Percentage Of Thorium Emanation Rose To About 15.
  • These Figures Refer To The State Of The Wire Immediately After The Exposure; The Rate Of Decay Is Much More Rapid For The Radium Than For The Thorium Emanation.
  • Helium is relatively abundant in many minerals, all of which are radioactive, and contain uranium or thorium as important constituents.

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