A New Æther-Drift Experiment

@article{Essen1955AN,
  title={A New {\aE}ther-Drift Experiment},
  author={Louis Essen},
  journal={Nature},
  year={1955},
  volume={175},
  pages={793-794}
}
  • L. Essen
  • Published 7 May 1955
  • Education
  • Nature
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References

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Proposal for a New Æther Drift Experiment
FURTH1 has recently suggested a repetition of the Michelson–Morley experiment using microwaves and attempting to detect the change in resonant frequency of a cavity as it is rotated through 90°.
Proposal for a New Æther Drift Experiment
IT is interesting to learn from L. Essen's communication1 that the accuracy of measurement of frequencies in the 9,000 Mc./s. region attained at the National Physical Laboratory with existing
Proposal for a New Æther Drift Experiment
TLDR
No experiments seem to have been carried out for testing whether such second-order effects could not be detected with standing electromagnetic waves, but the fact that the frequencies of microwaves in the centimetre region can now be measured with extraordinary accuracy, such waves could be used for this purpose with great advantage.
Proposal for a New Æther-Drift Experiment
IT has been suggested by H. Littman Furth1 that the Michelson–Morley experiment might be repeated, using microwaves in place of light waves, by measuring the resonant frequency of a cavity with the
Thermal Treatment of Raney Nickel Catalyst
It is well known that nickel catalyst, which is used in catalytic hydrogenation, is very sensitive to heat. In general, at higher temperatures of the hydrogenation reaction the decrease of catalytic