1882, May 27 Sodium-rays observed at Dunecht in spectrum of Comet Wells.

1882, June 10 Perihelion of Comet Wells.

1882, Sept. 17 Perihelion of Great Comet. Daylight detection by Common.

Transit observed at the Cape.

1882, Sept. 18 Iron lines identified in spectrum by Copeland and J. G. Lohse.

1882, September Photographs of comet taken at the Cape Observatory, showing a background crowded with stars.

1882, Dec. 6 Transit of Venus.

1882 Duplication of Martian ca.n.a.ls observed by Schiaparelli.

1882 Completion by Loewy at Paris of first equatoreal Coude.

1882 Rigidity of the earth concluded from tidal observations by G. H. Darwin.

1882 Experiments by Huggins on photographing the corona without an eclipse.

1882 Publication of Holden's _Monograph of the Orion Nebula_.

1883, Jan. 30 Orion Nebula photographed by Common.

1883, May 6 Caroline Island eclipse.

1883, June 1 Great comet of 1882 observed from Cordoba at a distance from the earth of 470 million miles.

1883 Parallaxes of nine southern stars measured by Gill and Elkin.

1883 Catalogue of the spectra of 4,051 stars by Vogel.

1884, Jan. 25 Return to perihelion of Pons's comet.

1884 Photometric Catalogue by Pickering of 4,260 stars.

1884 Publication of Gore's Catalogue of Variable Stars.

1884 Publication of Faye's _Origine du Monde_.

1884, Oct. 4 Eclipse of the moon. Heat-phases measured by Boedd.i.c.ker at Parsonstown.

1884 Duner's Catalogue of Stars with Banded Spectra.

1884 Backlund's researches into the movements of Encke's comet.

1885, February Langley measures the lunar heat-spectrum.

1885 Publication of _Uranometria Nova Oxoniensis_.

1885, Aug. 17 New star in Andromeda nebula discerned by Gully.

1885, Sept. 5 Thollon's drawing of the solar spectrum presented to the Paris Academy.

1885, Sept. 9 Solar eclipse visible in New Zealand.

1885, Nov. 16 Photographic discovery by Paul and Prosper Henry of a nebula in the Pleiades.

1885, Nov. 27 Shower of Biela meteors.

1885 Thirty-inch achromatic mounted at Pulkowa.

1885 Publication of Rowland's photographic map of the normal solar spectrum.

1885 Bakhuyzen's determination of the rotation period of Mars.

1885 Stellar photographs by Paul and Prosper Henry.

1886, Jan. 26 Spectra of forty Pleiades simultaneously photographed at Harvard College.

1886, Feb. 5 First visual observation of the Maia nebula with the Pulkowa 30-inch refractor.

1886, March Photographs by the Henrys of the Pleiades, showing 2,326 stars with nebulae intermixed.

1886, May Photographic investigations of stellar parallax undertaken by Pritchard.

1886, May 6 Periodical changes in spectra of sun-spots announced by Lockyer.

1886, June 4 An international Photographic Congress proposed by Gill.

1886, Aug. 29 Total eclipse of the sun observed at Grenada.

1886, Oct. 1 Roberts's photograph showing annular structure of the Andromeda nebula.

1886, Dec. 8 Roberts's photograph of the Pleiades nebulosities.

1886 Solar heat-spectrum extended by Langley to below five microns.

1886, Dec. 28 Detection by Copeland of helium-ray in spectrum of the Orion nebula.

1886 Thirty-inch refractor mounted at Nice.

1886 Publication of Argentine General Catalogue.

1886 Completion of Auwers's reduction of Bradley's observations.

1886 Draper Memorial photographic work begun at Harvard College.

1886 Photographic detection at Harvard College of bright hydrogen lines in spectra of variables (Mira Ceti and U Orionis).

1887, Jan. 18 Discovery by Thome at Cordoba of a great comet belonging to the same group as the comet of 1882.

1887 Publication of Lockyer's _Chemistry of the Sun_.

1887, April 16 Meeting at Paris of the International Astrophotographic Congress.

1887 Heliometric triangulation of the Pleiades by Elkin.

1887 L. Struve's investigation of the sun's motion, and redetermination of the constant of precession.

1887 Von Konkoly's extension to 15 S. Dec. of Vogel's spectroscopic Catalogue.

1887 Auwers's investigation of the solar diameter.

1887 Publication of Schiaparelli's Measures of Double Stars (1875-85).

1887, April 8 Death of Thollon at Nice.

1887, Aug. 19 Total eclipse of the sun. Shadow-path crossed Russia.

Observations marred by bad weather.

1887, November Langley's researches on the temperature of the moon.

1887, Nov. 17 Lockyer's _Researches on Meteorites_ communicated to the Royal Society.

1887 Completion of 36-inch Lick refractor.

1888 Kustner's detection of variations in the lat.i.tude of Berlin brought before the International Geodetic a.s.sociation.

1888 Chandler's first Catalogue of Variable Stars.

1888 Mean parallax of northern first magnitude stars determined by Elkin.

1888 Publication of Dreyer's _New General Catalogue_ of 7,844 nebulae.

1888 Vogel's first spectrographic determinations of stellar radial motion.

1888 Carbon absorption recognised in solar spectrum by Trowbridge and Hutchins.

1888, Jan. 28 Total eclipse of the moon. Heat-phases measured at Parsonstown.

1888, Feb. 5 Remarkable photograph of the Orion nebula spectrum taken at Tulse Hill.

1888, June 1 Activity of the Lick Observatory begun.

1888 Completion of Dr. Common's 5-foot reflector.

1888 Heliometric measures of Iris for solar parallax at the Cape, Newhaven (U.S.A.), and Leipsic.

1888 Loewy describes a comparative method of determining constant of aberration.

1888 Presentation of the Dunecht instrumental outfit to the nation by Lord Crawford. Copeland succeeds Piazzi Smyth as Astronomer-Royal for Scotland.

1888, Sept. 12 Death of R. A. Proctor.

1889 Photograph of the Orion nebula taken by W. H. Pickering, showing it to be the nucleus of a vast spiral.

1889 Discovery at a Harvard College of the first-known spectroscopic doubles, Zeta Ursae Majoris and Beta Aurigae.

1889 Eclipses of Algol demonstrated spectrographically by Vogel.

1889 Completion of photographic work for the Southern Durchmusterung.

1889 Boedd.i.c.ker's drawing of the Milky Way.

1889 Draper Memorial photographs of southern star-spectra taken in Peru.

1889 Pernter's experiments on scintillation from the Sonnblick.

1889 H. Struve's researches on Saturn's satellites.

1889 Harkness's investigation of the ma.s.ses of Mercury, Venus, and the Earth.

1889 Heliometric measures of Victoria and Sappho at the Cape.

1889, Jan. 1 Total solar eclipse visible in California.

1889, Feb. 7 Foundation of the Astronomical Society of the Pacific.

1889, March Investigation by Sir William and Lady Huggins of the spectrum of the Orion nebula.

1889, July-Aug. First photographs of the Milky Way taken by Barnard.

1889, August 2 Observation by Barnard of four companions to Brooks's comet.

1889, Nov. 1 Pa.s.sage of j.a.petus behind Saturn's dusky ring observed by Barnard.

1889, December Schiaparelli announces synchronous rotation and revolution of Mercury.

1889, Dec. 22 Total eclipse of the sun visible in Guiana. Death of Father Perry, December 27.

1889 Spectrum of Ura.n.u.s investigated visually by Keeler, photographically by Huggins.

1890 Long-exposure photographs of ring-nebula in Lyra.

1890 Determinations of the solar translation by L. Boss and O. Stumpe.