Part 66 (1/2)

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).