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 APPENDIX III.

THE LITERATURE OF COMETS.

Astronomy, being only a branch of general Astronomy, has naturally no great amount of special literature attaching to it; but readers of this volume who may desire to add to their knowledge of comets may like to know what works to consult, so I append the titles of the chief of those in circulation. They are arranged in the order of date of publication.

, Theatrum Cumeticum. 2 vols., fol. Amsterdam, 1668. [Contains accounts of 415 comets or supposed comets.]

, Cométographie; ou Traité historique et théorique des Comètes. 2 vols. 4to. Paris, 1783.

, Theoria motus Corporum Cælestium in sectionibus Conicis Solem ambientium. 4to. Hamburgi, 1809. [A German translation by C. Haase was published at Hanover in 1865; and a French translation by E. Dubois was published at Paris at about the same date.]

, ''The Comet. Scientific notices of Comets in general, and in particular of the Comet of'' 1832. Translated by C. Gold. 8vo. London, 1833.

, Abhandlung über die leichteste und bequemste Methode, die Bahn eines Cometen zu berechnen ... von neuem herausgegeben von J. F. Encke. 8vo. Weimar, 1847.

, The Comets: a descriptive Treatise upon those bodies, with a condensed account of the numerous modern discoveries respecting them; and a Table of all the calculated comets from the earliest ages to the present time. 8vo. London, 1852.

, A Popular Treatise on Comets reprinted from 'Popular Astronomy', by Arago. Translated by W. H. Smyth and R. Grant. 8vo. London, 1861.

, Comets and Meteors: their phenomena in all ages: their mutual relations and the theory of their origin. 12mo. Philadelphia, 1873.

, Cometic Orbits: with copious Notes. 8vo. Dublin, 1852.

, Repertorium der Cometen-Astronomie. München, 1864. [A very complete assemblage of comet orbits from 612 to 1864.]

, Lehrbuch zur Bahnbestimmung der Kometen und Planeten. 2 vols. 4to. Leipzig, 1870-80.

, The World of Comets. Translated from the French by J. Glaisher. 8vo. London, 1877.

, Verzeichniss der Elemente der bisher berechneten Cometenbahnen. Leipzig, 1894. [Comets from 372 to 1893, with copious notes.]

, Mechanische Untersuchungen über Cometenformen. Ed. by R. Jāgermann. St. Petersburg and Leipzig, 1903. [A complete exposition of Bredichin's theories with an immense number of engravings and diagrams.]