NEBULA, CLUSTERS, ETC. 



67 



Salter: A. N., lxxx, col. 299. [Ten stars in and near trapezium.] 



Schroeter : Aphroditographisehe Fragmente, p. 248. [Has a chart and 

 memoir.] 



: Beytrage zu den neuesten astron. Entdeckungen, vol. iii, p. 449. 



[With figures.] 



: B. J., 1797, p. 198. [Observations.] 



: B. J., 1801, p. 128. [Changes in nebula of Orion.'] 



Secchi : Mem. deWOss. Coll. Romano, 1852-55, p. 80, and Plate v. 

 [Drawing.] 



: Mem. dcll'Oss. Coll. Romano, 1856-7, p. 3. [New star in trape- 

 zium.] 



: Bull. Meteor, d. Coll. Romano, 18G5, January. 



: Ace. d. Nuovo Cimento, serie 2 a , vol. v-vi, 1872, p. 20. [The solar 



Corona is brighter than the nebula of Orion.] 

 : Atti dell'Ac. d. N. Lincei, Anno xxv, sess. iv, 1872, p. 49. 



[Spectrum.] See also, Anno vii, p. 88. 

 : Sulla grande nebulosa di Theta Orione. 1868. 4°. Mem. Hal. 



Soc. Firenze, vol. i. [Memoir ; drawing ; spectrum.] 



: A. N., xlv, col. 60. [Sketch of nebula of Orion.] 



: Mon. Not. R. A. S., vol. xviii, p. 8. 



: Mon. Not. R. A. S., xxv, p. 153. [Spectrum.] 



: Mon. Not. R. A. S., vol. xxviii, p. 162; xxix, p. 165. 



: C. R., xliv. p. 1279, and xlv, p. 170. [Porro's new star.] 



: C. R., lx, p. 543. [Spectrum.] See also p. 468. 



: C. R., lxv, p. 63. 



: C. R.. lxvi, p. 643. 1868. [Spectrum, etc.] 



: Sugli Spettri Prismatici. Mem., i, ii, iii. 



Senarmont : C. R., xliv, pp. 1075, 1294. [Porro's new star.] 

 Smith: Opticks. 4°. [Huyghens' drawing.] 



Stone, E. J., and Carpenter: Mon. Not. R. A. S., xxiv, p. 92. [On G. 

 P. Bond's drawing of nebula of Orion.] 



Struve, 0. : Observations de la grande nebuleuse d' Orion, avec 4 planches. 

 Mem. de I'Acad. Imp. des Sciences de St. Petersbourg, tome v, 

 No. 4, 1862. See M. M., ii, p. 517. [Abstract of above me- 

 moir.] 



: Bull, de la Classe Phys.-Math. de V Acad. Imp de St. Petersbourg^ 



xvi, 185 ■>, col. 113. 



: M. M., iii, p. 535. [Observations at Malta.] 



: M. M., iii, p. 550. [Variability of nebula of Orion.] 



: Mon. Not. R. A. S., xvii, p. 225. [Stars.] 



