Shifting of the Earth's Axis

Details Shifting of the Earth's Axis Shifting of the Earth's Axis

Oct 1884

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1884natur..30..536c&link_type=abstract

Nature, Volume 30, Issue 779, pp. 536 (1884).

Physics

Scientific paper

WITH reference to the letter of Mr. W. M. Flinders Petrie (NATURE, September 25, p. 512), I would remark that there has been no sensible change in the latitude of Greenwich (as found by observations of circumpolar stars) during the last forty-seven years, a period nearly twice as long as that covered by the Pulkowa observations which M. Nyren has discussed. In a paper on the ``Systematic Errors of the Greenwich North Polar Distances'' (Mem. R.A.S. vol. xlv.), I have exhibited the results for the co-latitude of the centre of the Greenwich transit-circle for each year and for groups of years from 1836 to 1877 reduced to the same refractions throughout (Bessel's), and corrected where necessary for index-error of the thermometer, and the accordance of the individual results is as close as can be expected, when allowance is made for the systematic errors to which all observations are liable, but which are usually ignored in estimating theoretically the probable errors of mean results. It may suffice if I here give the results for co-latitude for three periods of years:-

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