William Crookes
Sir William Crookes (* 17. June 1832 in London; † 4. April 1919 ebenda) was an important English physicist, chemist and a science journalist.
After Assistenztätigkeit at August, he gave 1859 to William of Hofmann and an occupation at the Ratcliffe observatory as a Meteoroligist asPrivate scholar the magazine Chemical news out.
1861 discovered Crookes in its spectroscopic attempts the chemical element thallium, designated after the Greek word thallos (“greener branch”) because of the green action of light in the spectrographic analysis. 1863 it became member of the Royal Society.
Its investigations of the electricity linein gases with low pressure led it to the discovery of the cathode rays, which apparent withdrew when constant decrease the pressure increasingly from the negative electrode. This had already in former times described Johann hit peat, without being able to achieve however the necessary attention. Today one knows naturethe cathode rays as a river of free electrons. Crookes under first was simultaneous, with the plasma condition was occupied. Accompanying with it it developed the “Crookes light tube in such a way specified”.
One this very day in some business offered plaything, the “light wind wheel in such a way specified” or also” light mill“one invented by Crookes in the year 1873. (In the English-language area also “radiometer” mentioned)
in the year 1900 he discovered the thorium isotope 234 Th.
Crookes was interested in the mirror-image ritualism and experimented with numerous media. It was member of the Theosophi society and published some articlesin the theosophischen magazine Sphinx. 1896 to 1897 he was a president of the Society for Psychical Research.
works
- mirror-image ritualism and science; Oswald cap, Leipzig 1871
- radiating subject or the fourth state of aggregation; Quantum and trade, Leipzig 1879
Literature
- Tischner, Rudolf (Hrsg.): The medium D. D. Home, investigations and observations, (after Crookes, Butlerow, Varley, Aksakow and lord Dunraven); Oswald cap, Leipzig 1925
- Tischner, Rudolf (Hrsg.): Materialisationsversuche of William Crookes; Oswald cap, Leipzig 1923
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- {{#if:
| |* Literature of and over William Crookes in the catalog of the DDB
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| person data | |
|---|---|
| NAME | Crookes, William |
| ALTERNATIVE NAME | |
| SHORT DESCRIPTION | of meaning English physicists, chemists and science journalist |
| DATE OF BIRTH | 17. June 1832 |
| PLACE OF BIRTH | London |
| DYING DATE | 4. April 1919 |
| DYING PLACE | London |
