70 INDEX CATALOGUE. 



D'Arrest: A. N., xlii, col. 103. 



: A. N., lvi, col. 328. [Hind's variable nebula.] 



: A. N., lvii, col. 337. [Hixd's variable nebula and otbers.] 



: A. N., lviii, col. 155. [Discovery of a second variable nebula in 



Taurus.'] 



: A. N., lix, col. 13. [Merope nebula.] 



: A. N., lx, col. 377. [On Chacorxac's variable nebula near £ 



Tauri.~\ 



: A. N, lxiv, col. 125. [Disappearance of a nebula.] 



: A. N., lxviii, col. 251. [Three missing nebula?.] 



: A. N., lxxi, col. 143. [IIixd's variable nebula.] 



: A. X., lxxix, col. 193. [Changes in spectrum of H. iv, 37.] 



Dreyer : V. J. S., 1876, p. 200. [Merope nebula not seen in Lord Rosse*s 

 telescopes.] See Rosse in Nature, vol. xv, p. 307. 



Ellery : Mon. Not. R. A. S., xxxiv, p. 2G0. [Nebula in Argo.~\ 



Engelmann, R. : Messungcn 90 Doppelsternen, etc., p. 147. [Variability 

 of stars in nebula Orionis.~] 



Gould : Mon. Not. R. A. S., xxxii, p. 178. [Nebula in Argo.] 



Hall, Maxwell : Nature, 1877, p. 244, [Jan. 11.] [Merope nebula.] 



Herschel, J. : Mon. Not. R. A. S., xxii, p. 218. [Missing nebula in Coma 

 Berenices.] 



: Mon. Not. R. A. S., xxviii, p. 225 ; xxix, pp. 82, 104, 228. [Neb- 

 ula in Argo.~\ 



: The General Catalogue of Nebula? and Clusters of Stars, P. T., 



18G4, has [pp. 14-40] notes on various nebulaj, from which the 

 following in regard to variable nebuloe has been extracted. A 

 few additions have been made from other sources : 



I. Variable nebula?, [brightness ] — G. C. 768, [Tempel] ; 

 830, [Hind] ; 1702; 2107?? [rj Argiis] ; 2211, [Vogel] ; 2319; 

 2405; 3079; 3254; 3311; 3858??; 3977; 4016; 4173? ; 441-5, 

 [Tuttle] ; 4473, [Hind] ; 4922. 



II. Variable nebula?, [proper motion.] — G. C. 2501 ; 3138, 

 3588. 4051-2 binary? See Rosse, P. T., 1861, p. 704. G. C. 

 4403??, G. C. 4355, [Holdex.] 



III. Variable nebula?, [possible comets.] — G. C. 573, 614, 

 1696, 2094, 2846, 3550. 



