Nebulse. 



21;' 



7800 



Stromgren. Beoljaclitungfn auf der 

 Uuiveisitiitssternwarte in Kopenliagen. 

 Nova (IS.lUli) Gemiuorum 2. A.N. 

 191 (67) ; Mitteiliingpn tiber x u"*^^ ' 

 O])liiiiolii. op. cit. 193 (!)0). 



Sutton. A review of some theories 

 advanced in explanation of the 5 Cephei 

 type of variable. P. A. 19 (108-414). 



Thomsoa. 21957. Visual observa- 

 tions of Nova Geniinonun (2) 1912 ; 

 21958 : Nova Geminoruin 1912; 21959 : 

 Nova Geminoriim (2). 



Turner. The similarity between the 

 variations of S. Persei and of sun-spots. 

 M.N. 73(11G). 



Vysotsldj. 22028. Observations des 

 etoiles variables tj Aquilao et p Cassio- 

 pejae. (Russ.) 



Wasnetzoff. x Cygni. A.N. 192 

 (387-.388). 



Williams. 220G0. Suggestions for a 

 natural system of classification for 

 A'ariable stars. 



Wilson. New positions of stars in 

 the Huygenian region of the nebula 

 in Orion. A.S.P. 23 (237) ; A new star 

 in Lacerta. P.A. 19 (81) ; Nova Gemi- 

 uorum No. 2. op. cit. 20 (388-390 

 with ff.). 



Wolf. Nova (18.1912) Geminorum 

 2. A.N. 191 (66 167); Nova (?) 87. 

 1911 Persei. op. cit. 192 (7); Stern 

 BD— 5° 4556. op. cit. 193 (89). 



Yendell, P[aul] S[ebastian]. Note 

 on RU Cassiopeiae and BD -f 63° 149. 

 A.J. 27 (37) ; Corrigendum, t.c. (66) ; 

 On the variable star TV (45.1911) 

 Cassiopeiae. A.N. 191 (724). 



Zinner. 22147. The distribution of 

 variable stars. 



7700 STAR CLUSTERS. 



Chapman. 20811. Globular clusters. 



Curtis. Descriptions of 132 nebulae 

 and clusters photographed with the 

 Crossley reflector. Lick B. 7 (81-84). 



D'Esterre. Some observations of the 

 region around the star clusters. H.VI. 

 33.34 Persei. M.N. 73 (75). 



Kostinsky. 21315. Le mouvement 

 propre des etoiles dans les environs des 

 amas stellaires x et h Persee. (Russ.) 



Maanen, van. 21444. The proper 

 motions of 1418 stars in and near the 

 clusters Ji and x Persei. 



Pickering. Periods of 25 variable 



stars in tiie Small Magellanic clouds. 

 Ilarv. C. 173 (1-3 with IT. table). 



Tichov. Etudes spectrophotometriques 

 des Pleiades. Application au jiroblemede 

 I'absorplion cosmique. M.S.Pk. 4 (35). 



7800 i\EBULJi!. 



A remarkable nebula in Centauinis. 

 Observatory London 36 1913 (79 with 



pi.). 



Archenhold. 20565. Der planelari- 

 sche Ringnebel in der Andromeda mit 

 veriinderlichem Kern. 



BaUey. 20587. 1659 now nebulae. 



Bigourdan. Un projet de Catalogue 

 general de nelndeuses et d'amas stellaires 

 et sur diverses qut^stions que souleve ce 

 projet. C.R. 154 (1661-1665). 



Curtis. The planetary nebulae. ArS.P. 

 24 (195) ; Three interesting spiral 

 nebulae, t.c. (227) ; Descriptions of 132 

 nebulae and clusters photograplied with 

 the Crossley reflector. Lick 15. 7 (81-84). 



Dreyer. Corrections to the N.G.C. 

 resulting from the revision of Sir W. 

 Herschers three catalogues of nebulae. 

 M.N. 73 (37). 



Henkel. 21169. The spiral nebulae. 



Heyden. 21183. Des Himmels Strah- 

 lungsbilder. Experimental optische 



Skizze. [Nordlicht. Spiralnebel. Komet.] 



Innes. 21229. The nebula N.G.C. 

 6822 Barnard. 



Krebs, 21331. Ringnebel als Wirbel- 

 ringe. 



Lorenz. 21401. Photographische 

 Positionsbestimmung von 178 Nebel- 

 flecken nebst einer Methode ziir nach- 

 triiglichen Reduktionfiir Eigenbewegung 

 der Anschlussstei'ne. Diss. 



Meunier. La combustion gazeuse 

 tourbillonnaire et son analogie avec 

 les apparences des nebuleuses et des 

 cometes. C.R. 154 (1156-1159). 



Palisa. 21638. Planeten- imd Kome- 

 ten-Beobachtungen am Grubbschen Re- 

 fraktor von 67 cm OeSnung in den Jahren 

 1903-1906. 



Reynolds. Preliminary observations 

 of spiral nebulae in polarised light. 

 M.N. 72 (553). 



