66 INDEX CATALOGUE. 



Legentil : Remarques sur les Etoiles nebuleuses. Hist, de I' Ac. Roy. des 

 Sciences, 17-39, p. 4-33, [with several figures.] 



LeSueur : Proc. R. S., xviii, pp. 1, 242. [Spectrum.] 

 : Proc. R. S., xix, p. 18. [Spectrum.] 



LeVerrier : C. R., vol. xliv, 18-39, pp. 1074, 1293—5. [Porro s new star 

 in nebula of Oriun.~\ 



Liaponoff : See Strive. 



: Mun. Not. R. A. S., vol. xxiii, p. 228. [Review of his memoir.] 



Long : Astronomy, vol. i, p. 321, plate G7, fig. 96. [Observations and 

 drawing.] 



Mairan : Traite de 1'Aurore Boreale, [p. 249; nebula Orionis varies in 

 shape ; date of Picard's drawing given as 1G73, March 20. 

 Mairan's drawing, (fig! xxvii,) 1727-1733.] 



Messier: Nebuleuse A'Orion. Hist, de V Acad. R. des Sciences, 1771, pp. 

 435, 458. [Drawing.] 



Nich.01 : System of the world, 1846, p. 55. [Lord Rosse's observations.] 



Poild : On an appearance hitherto unnoticed in the nebula of Orion. Mem. 

 R. A. S., iii, 1826, p. 93. [Recession of the nebula from the 

 stars.] [See also same volume, p. 187, for an observation of J. 

 Herschel and Ramage on this point.] 



Porro: Mem. deWOsserv. Coll. Romano, 1856-7, p. 3. [Discovery of a 

 new star in trapezium.] 



: A. N, xlvi, col. 171. [Same.] 



: C. R., xliv, p. 1031. [Same.] 



Robinson : Nature, vol. xv, p. 292. [Note on the resolvability of the 

 central part of nebula Orionis.] 



Eondoni : See DeVico. 



Rosse* : Account of observations on nebula of Orion, 1848-1867, P. T., 

 1868, part i, p. 57. [Plates.] For a review of this, see O. 

 Struve in V. J. S., 1870, p. 25. 



: Man. Not. R. A. S., xxix, p. 165. 



* Fourth Earl of Kosse. 



