ll in twelve hours.
1892, March 6 Discovery of a bright comet by Swift.
1892, June 29 Death of Admiral Mouchez. Succeeded by Tisserand
as director of the National Observatory, Paris.
1892, Aug. 4 Favourable Opposition of Mars.
1892, Aug. 17 Rediscovery at Lick of Nova Aurigae.
1892, Sept. 9 Discovery by Barnard of Jupiter's inner satellite.
1892, Oct. 12 First photographic discovery of a comet by Barnard.
1892, Nov. 6 Discovery of Holmes's comet.
1892, Nov. 23 Shower of Andromede meteors visible in America.
1892 Poynting's Determination of the Earth's Mean Density.
1892 Duner's Investigation of the System of upsilon Cygni.
1892 Photographic investigation by Deslandres of the
spectra of prominences.
1892 Photographs of the sun with faculae and chromospheric
surroundings taken by Hale with a single exposure.
1892 Investigation by T. J. J. See of the ancient colour of
Sirius.
1892 Publication of T. J. J. See's Thesis on the Evolution
of Binary Systems.
1892 Chandler's theory of Algol's inequalities.
1892 Nebula in Cygnus photographically discovered by
Max Wolf.
1893, Jan. 28 Kapteyn's investigation of the structure of the stellar
universe.
1893, March 10 Gill announces his results from the Opposition of
Victoria, among them a solar parallax = 8.809".
1893, April 16 Total solar eclipse observed in South America and
West Africa.
1893 Publication of Kruger's _Catalog der Farbigen Sterne_.
1893 Conclusion of Boys's series of Experiments on the
Density of the Earth.
1893 Publication of _Cordoba Durchmusterung_, vol. i.
1893 Fabry shows comets to be dependents of the Solar System.
1893 Publication of Easton's _Voie Lactee_.
1893 Campbell detects bright H Alpha in Gamma Argus and
Alcyone.
1893 Nova Normae photographed July 10; discovered on
plates, October 26.
1893, May 28 Death of Professor Pritchard.
1893, July 27 Installation of 28-inch refractor at the Royal
Observatory, Greenwich.