NEBULyE, CLUSTERS, ETC. 



11 



Cassini, J. D. : Elemens cV Astronomic, 1740, 4°, p. 77. [Brief historical 



note.] 

 — : De Cometa anni 1G52-3. [Nebulae of Andromeda and Orion. 



Discovery of the fourth star in Orion's trapezium.] 

 : Decouverte de la lumiere celeste qui parait dans le Zodiaque. 



[Suspects nebula; of Andromeda and Orion to be star clusters.] 



For the last two references see Delambre, Hist, de VAst. Mo- 



derne, vol. ii, pp. 700, 709, 744.] 

 : Etoile nebuleuse de la constellation de l'Ecrevisse. Hist, de VAcad. 



R. des Sci., x, p. 117. 



Catalogue des Nebuleuses, etc. : Observees par Messier a Paris, et par 

 Lacaille au Cap. C. T. 1783. 



Cb.acomaC : National Almanac, [U. S.,] 8vo, 1864, p. 3G. [Notice of 



discovery of his variable nebula.] 

 . : Bull. Internat. de I'Obs. de Paris. 18G3, April 26. [Variable 



nebula h. 1191.] 

 C. R., lv, 1862, p. 888. 



Nebuleuse variable de £ Taureau. C. R., lvi, 1863, p. 637. 

 C. R., lxvi, p. 306. [Notice of a paper presented to the Academy 



of Sciences on the constitution of nebula?.] 

 : A. N, lvii, col. 374. [Annular nebula of Lyra.~\ See Les Monde s, 



No. 9, p. 241. 

 . : [Missing nebula in Coma Berenices.^ Mon. Not. R. A. S., xxii, 



p. 277. 

 Chambers : Descriptive Astronomy, 8°, 1867, p. 568. Catalogue of 109 re- 

 markable nebulas and clusters. See also pp. 496, 500, 502, 535. 



and 710. 

 CfceseuX : [In Mem. de VAcad. R. des Sciences, 1759, p. 469, reference is 



made to a paper of Cheseux on nebulas, read by Reumek, 



1746, August 6. In the Mcmoires for 1746 I have not been able 



to find any reference to this.] 

 Coniptes Rendus : See Academy of Sciences. 



Collegio Romano : Bull. Meteor. deWOsserv., 1865, January. Secchi. 

 : Memorie dell' Osservatorio. 



