Rotation of the Earth and Magnetostriction


IN 1926, Prof. E. W. Brown presented the evidence indicating remarkable changes in the rate of the earth's rotation (Trans. of the Astronomical Observatory of Yale University, vol. 3, part 6). Changes, more or less abrupt, were shown to have occurred about 1785, 1850, 1898, and 1918. Prof. Brown finds that the observational data are consistent with the hypothesis of an oscillatory change in the earth's mean radius. Why the earth should expand and contract, he makes no suggestion, but gives a study of the occurrence of earthquakes, which, however, shows no well-defined correlation. He cites a theory of Prof. Joly (Observatory, February, 1926) that the vertical oscillations of the earth's crust may be caused by a thermal effect of radium acting in a substratum of basalt.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

KING, E. Rotation of the Earth and Magnetostriction. Nature 123, 15–16 (1929).

Download citation

Further reading


By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.