A Popular History of Astronomy During the Nineteenth Century Part 68

1896, January Fessenden's electrostatic theory of comets.

1896 Chandler's Third Catalogue of Variable Stars.

1896 Publication of Lick Observatory Photographic Atlas of the Moon, part i.

1896, February Effects of pressure on wave-length described by Humphreys and Mohler.

1896, April 5 Opening of new Scottish Royal Observatory on Blackford Hill, Edinburgh.

1896, April Pickering's photometric determinations of light curves of variable stars.

1896 One of the stars of Castor spectroscopically resolved into two by Belopolsky.

1896, May Third Astrographic Chart Conference at Paris.

1896, Aug. 9 Total eclipse of the sun visible in Novaya Zemlya.

Reversing layer photographed by Shackleton.

1896, Aug. 30 Death of Hubert A. Newton.

1896, Sept. 18 Death of Hippolyte Fizeau.

1896, Oct. 20 Death of F. Tisserand. Succeeded by Maurice Loewy.

1896, Nov. 13 Detection by Schaeberle of Procyon's missing satellite.

1896, Nov. 26 Death of Benjamin Apthorp Gould.

1896, November Second series of hydrogen-lines discovered by Pickering in stellar spectra.

1896, December Zeeman's discovery of spectral modifications through magnetic influence.

1896, December Oxygen-absorption identified in the sun by Runge and Paschen.

1896 Study of lunar formations by Loewy and Puiseux.

1896 Mounting of the Mills spectrograph at the Lick Observatory.

1897 Installation at Greenwich of the Thompson 26-inch photographic refractor.

1897 Publication of Miss Maury's Discussion of the Photographed Spectra of 681 Stars.

1897 Callandreau's researches on cometary disaggregation.

1897 Braun's determination of the earth's mean density.

1897 Tenuity of calcium vapour in chromosphere demonstrated spectroscopically by Sir William and Lady Huggins.

1897 Completion at the Cape Observatory of McClean's spectrographic survey of the heavens.

1897 Twenty-one Wolf-Rayet stars found by Mrs. Fleming in Magellanic Cloud.

1897 Percival Lowell's _New Observations on the Planet Mercury_ presented to the American Academy.

1897, April 8 McClean recognises oxygen-absorption in helium stars.

1897, May 9 Death of E. J. Stone, Radcliffe Observer.

1897, June 10 Death of Alvan G. Clark.

1897, June 18 Spectrum of a meteor photographed at Arequipa.

1897, Oct. 21 Inauguration of the Yerkes Observatory.

1897 Rabourdin's photographs of nebulae with the Meudon reflector.

1897 Dr. See's discoveries of Southern double stars with the Lowell 24-inch refractor.

1898, Jan. 22 Total eclipse of the sun visible in India.

1898, February Binary character of Zeta Geminorum ascertained spectroscopically by Belopolsky.

1898 Star with proper motion of nearly 9" discovered by Innes and Kapteyn from the Cape Durchmusterung plates.

1898, March 8 Nova Sagittarii photographed on Draper Memorial plates.

1898, June 20 Opening of Grand-ducal Observatory at Konigsstuhl, Heidelberg.

1898 Keeler succeeds Holden as Director of the Lick Observatory.

1898 Bruno Peter's results in stellar parallax.

1898 Lewis Swift's discoveries of nebulae at Echo Mountain, California.

1898 Hale's photographic investigation of carbon stars.

1898, Aug. 14 Discovery of Eros by Witt.

1898 Flint's investigations of stellar parallax by meridian differences.

1898 Easton's spiral theory of the Milky Way.

1898 Seeliger's research on star distribution.

1898, October Multiple hydrogen-bands observed by Campbell in Mira Ceti.

1898, November Orbit of a Leonid meteor photographically determined by Elkin.

1899 Publication of Potsdam _Photometric Durchmusterung_, part ii.

1899 Innes's _Reference Catalogue of Southern Double Stars_.

1899 Keeler's photographs of nebulae with the Crossley reflector and generalization of their spiral character.

1899, January Spectrum of Andromeda nebula photographed by Scheiner.

1899, April Photographic discovery of Nova Aquilae by Mrs. Fleming.

1899, Aug. 26 Installation of 31-inch photographic refractor at Potsdam.

1899 Campbell's detection of Polaris as spectroscopically triple.

1899, October Duplicate discovery by Campbell and Newall of Capella as a spectroscopic binary.

1899, Nov. 15 Failure of the Leonids. Deflection of the stream predicted by Johnstone Stoney and Downing.

1899, December Publication of Sir William and Lady Huggins's _Atlas of Representative Stellar Spectra_.

1899 Thirty-two-inch photographic refractor mounted at Meudon.

1899 Issue of first volume of Potsdam measures of international catalogue plates.

1900, Jan. 27 Kapteyn's determination of the apex of solar motion.

1900 Chase's measures for parallax of swiftly-moving stars.

1900 Publication of Gill's _Researches on Stellar Parallax_.

1900 Kapteyn proposes a method for a stellar parallax Durchmusterung, and gives specimen results for 248 stars.

1900 Burnham's general catalogue of 1,290 double stars.

1900 Publication of the concluding volume of the _Cape Photographic Durchmusterung_.

1900, May 28 Spanish-American total eclipse of the sun.

1900, July International Conference at Paris. Co-operation arranged of fifty-eight observatories in measures of Eros for solar parallax.

1900 Horizontal refractor, of 50 inches aperture, 197 feet focus, installed in Paris Exhibition.

1900, Aug. 12 Death of Professor Keeler. Succeeded by Campbell in direction of Lick Observatory.

1900, November Opposition of Eros.

1900 Publication of Roberts's _Celestial Photographs_, vol. ii.

1900 Complete publication of Langley's researches on the infra-red spectrum.

1900 Printing begun of Paris section of International Photographic Catalogue.

1901, Feb. 22 Nova Persei discovered by Anderson.

1901, February Variability of Eros announced by Oppolzer.

1901, April 23 Apparition of a great comet at the Cape.

1901 Publication of Pickering's _Photometric Durchmusterung_.

1901 Miss Cannon's discussion of the spectra of 1,122 Southern stars.

1901 Kapteyn's investigation of mean stellar parallax.

1901 Campbell's determination of the sun's velocity.

1901 Porter's research on the solar motion in s.p.a.ce.

1901 Bigelow's magnetic theory of the solar corona.

1901 Hussey's measurements of the Pulkowa double stars.

1901 Radial velocities of the components of Delta Equulei measured at Lick.

1901, April 16 Death of Henry A. Rowland.

1901, June Nebular spectrum derived from Nova Persei.

1901, Aug. 23 Nebula near Nova Persei photographed by Max Wolf.

1901, Sept. 20 The same exhibited in spiral form on a plate taken by Ritchey at the Yerkes Observatory.

1901, Nov. 8 Photograph taken by Perrine with the Crossley reflector showed nebula in course of rapid change.

1901, Sept. 19 Unveiling of the McClean "Victoria" telescope at the Royal Observatory, Cape of Good Hope.

1901 Sun-spot minimum.