NEBULA, CLUSTERS, ETC. 53 



Safford : Keport of Chicago Astronomical Society, May, 1877. [Dis- 

 covery of about one hundred new nebulas.] 



Salter : See Denning. A. N., lxxx, col. 299. [10 stars in and near Orion 

 trapezium.] 



Savans Etrangers : Memoires. Vol. ii, p. 137. Legentil. 



Schellen : Spectrum Analysis, translated by the Misses Lassell, 8vo., 

 1872, p. 525. [Spectra of nebulas and clusters.] 



Schjellerup : Description des Etoiles fixes, etc., par Sufi, St. Petersburg!), 

 1874. [Notes that Sufi says the nebula of Andromeda was gen- 

 erally known before A. D. 900.] 



Schmidt, J. F. : A. N., liv, col. 321. [On observations of nebulas in 

 general ; on D'Arrest's Leipzig observations in particular, 

 with differences of a and 6 of stars with the nebulse h. 50, 

 51, 262, 1622, and 1970, 2000, 2047, 3625, 2098, 2128, etc. Per- 

 sonal differences in D'Arrest's and Schmidt's nebula observa- 

 tions.] 



: A. N., lv, col. 91. [Nebulous star h. 3624 and on a new variable 



nebula.] 



: A. N., lvii, col. 162. [Observations.] 



: A. 2V., lvii, col. 243. [Variability of No. 6 of Bonn zones and 



Hind's variable nebula.] 



: A. N., lviii, col. 353. [Tempel's variable nebula.] 



: A. N., lxiv, col. 1. [Method of observing nebulas.] 



: A. N., lxv, col. 261. [Observations ; M. 8 contains a variable star.] 



: A. N., lxix, col. 302. [Observations of a new nebula.] 



: A. N., lxx, col. 343. [Places of 110 nebulse for 1865.0.] 



■ : A. N., lxxviii, col. 199. [S. Corona nebulous ?] 



: A. N., lxxxviii, col. 138. [Ueber einige imCap-Katalog fehlende 



Nebel.] 



: A. iV., lxxxviii, col. 283. [Connection of variable stars with 



nebulse.] 



Schonfeld: Ast. Beob. Mannheim, Abth. i, 1862; ii, 1875. [Both the 



above give positions and observations of nebulse.] See V. J. S. 



1876, p. 269. 

 : A. N., lviii, col. 355. [On variability of nebula No. 548, Bonn 



zone -f 30° ; list of nebulae in the Durchmusterung.~\ 



: Ueber die Nebelflecke. [Mannheim Jahresber., xxviii, p. 46.] 



: Nature, Aug. 12, 1875, p. 292, 2d col. [Nebula of Andromeda has 



no proper motion.] 

 : C. R., vol. lv, 1862, ii, p. 792. [Discovery of two nebulse.] 



