NEBULiE, CLUSTERS, ETC. 71 



Herschel, Capt. J. : Mon. Not. R. A. S., vol. xxix, p. 82; xxxi, p. 235. 

 [Nebula in Argo.~\ 



Hind: Am. Jour. Sci., 2d series, xxxiii, p. 436. [His variable nebula in 

 Taurus.] 



: Nature, 1876, Oct. 19, p. 543. [Chacornac's variable nebula.] 



: Hon. Not. R. A. S., xxiv, p. 65. [Variable nebula in Taurus.] 



% : A. N, xxxv, col. 371. [Discovery of a variable nebula, a = 



4" ll m 50 s ; <J = + 19° 8'.] 

 : Nature, 1876, p. 545. [Chacornac's variable nebula.] 



Holden: On supposed changes in M. 17 = G. C. 4403. Am. Jour. Sci., 

 3d series, xi, p. 341. 



: On the proper motion of G. C. 4355. Am. Jour. Sci., 1877, Dec. 



Key: [45, H. iv, Qeminorum.] Mon. Not. R. A. S., xxviii, p. 154. 

 Knott: [45, H. iv, Qeminorum.] Mon. Not. R. A. S., xxv, pp. 62, 191. 



Le SU2Ur: Scientific Opinion, vol. iii, p. 250. [Nebula in Argo.~\ 

 : Trans. R. S. Victoria, x, pp. 11-23. [Nebula in Argo.] 



Le Verrier : C. R., vol. liv, 1862 ; p. 299. [Hind's variable nebula.] 



Mairan : Traite de VAurore Boreale, p. 248. [Nebula of Orion varies in 

 shape.] 



McG-eorge : Proc. R. S. Victoria, x, pp. 71, 106. [?; Argus.] 

 Melbourne Obs'y : Report of Board of Visitors, 1875. [?; Argiis.] 



Petersen : Ast. Jour., i, p. 47. [Hind's nebula.] 



Pogson : Mon. Not. R. A. S., xxi, p. 32. [Changes in 80 M.] 



Pons and De Zach : Corres. Astron., vol. xiv, p. 410. [Changes in neb- 

 ula?.] 



Powell, E. B. : Mon. Not. R. A. S., xxiv, p. 171. [Nebula in Argo.] 



Proctor: Mon. Not. R. A. S., xxxiii, p. 14. [Nebula in Argo.] 



