On the Purification and Testing of Selenion

  title={On the Purification and Testing of Selenion},
  author={Richard N Threlfall}
In 1895 I was enabled by a Royal Society grant to obtain about 100 lbs. weight of selenion of about 99·5-per-cent. selenion content. The grant was applied for to enable me to extend to selenion the investigations already made on purified sulphur. For the purpose of the investigation it was necessary to purify the selenion beyond the standard usual for material to be used in atomic weight investigations. This proved in the event to be impossible on account of the comparatively slight volatility… CONTINUE READING

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