Double Stars. 



210 



7510 



Aitken. The companions of Sirius 

 and Procyon. A.S.P. 24 (228-229). 



Baranov. 20Gli. Mesures des etoiles 

 doubles de V et VI classes d'apres 

 Herschel. (Russ.) 



Barnard. The companions of Procvou 

 and Sirius. A.J. 27 ( 107j . 



Beattie. 2004.3. Lacaille 7194. A 

 rapid binary. 



Benes. Mikrometermessungen von 

 Doppelsternen. A.N. 192 (229-234). 



Doberck. Sutton double star observa- 

 tions. A.N. 191 (201-214) ; 192 (277- 

 28S). 



Espin. New double stars. M.N. 73 

 (162). 



Hussey. Struve double stars. Lick 

 B. 6 182-19.5). 



Dmes. 2123-3. Measures of southern 

 double stars. 2nd series. 



Lau. Frage der Schichtverzerrungen 

 bei Doppelsternenaufnahmen. A.N. 192 

 (63-06). 



Leavenwortli. Double star measures, 

 made with the lOj-inch equatorial of the 

 University of ilinnesota. Magnifving 

 power GOO. A.J. 27 (71). 



Luplau-Janssen und Buch- Andersen. 

 Mikrometermessungen von Doppel- 

 sternen 1911-12. A.N. 193 (9-14). 



Phillips. Micrometrical measures of 

 double ^^tars. M.N. 72 (70yj ; 73 (159). 



Schiller. (Tber eine Vervollkomm- 

 nung der „ Prismenmethode " bei Posi- 

 tionswinkelmessiingen von Doppelster- 

 nen. A.N. 192a-8;. 



Tebbutt. Measures of Southern 



binary stars in 1911. M.N. 72 1912 

 (563j. 



Wirtz. 22079. Beobachtungen von 

 Doppel- und Nachbarsternen am 49 cm- 

 Refraktor. Ti 1 : 1902 bis 1910. 



7520 LISTS. CATALOGUES. 



COLOURS OF DOUBLE STARS. 

 SPECTRO.SCOPIC BINARY 



SYSTEMS. SPECTROSCOPIC 

 OBSERVATIONS OF VISUAL 

 BINARY SYSTEMS. INVISIBLE 

 Co:yiP ANIONS. DISTRIB UTION 

 ■ IN HE.AVENS ACCORDING 

 TO NUMBER, MAGNITUDE, 

 COLOUR. Etc. 



Aitken. New double stars. A.S.P. 

 23(238); The number of optical pairs 



among double stars whose angular 

 separation is 5" or less. Op. cit. 24 

 (126-128 with table) ; One hundred new 

 double stars. Eighteenth list. Lick B. 

 6 (163-165). 



Ludendorff. Die Radialgeschwindig- 

 keit von <p Persei. A.N. 192 (173). 

 21422 : Verzeiclinis der Bahnelemente 

 spektroskopischer Doppelsterne. 



Roe. New double stars. P. A. 19 

 (383 589). 



ScMesinger and Baker. 21814. A 

 comparative study of spectroscopic 

 binaries. 



7530 DISCUSSION OF ORBITS. 

 DIMENSIONS, MASS AND 

 DLSTANCE OF BINARY 



SYSTEMS. 



Aitken. Orbits of the binary stars 

 6)01, )3.j.sl, 02 79 and 02 235. A.S.P. 

 24 (■165-167)1; Orbits of the visual and 

 spectrographic binarv star Epsilon 

 Hydrae AB. t.e. (216-219). 



Doberck. The orbit of y Coronae 

 Australia. A.N. 191 (125); the masses 

 of double stars, t.c. (42.5-426). 



Fox. The orbit of Holden 60, B.G.C. 

 12696. P. A. 19 (17-18 with fig.). 



Luplau-Janssen. La vitesse aerolaire 

 dans le svsteme de ? Boot is. A.N. 192 



(287-290). 



Russell. Elements of the eclipsing 

 variables \V Delphini, W Ursae Majoris, 

 and W Crucis. Ap..J. 36 (133-155 with 



tables ff.). 



and Shapley. On darken- 

 ing at the limb in eclipsing varialjles. 

 1 [and 2]. Ap. J. 36 (239-254 385-408 

 with fig. and tables). 



Schlesinger and Baker. 21814. A 

 comparative study of spectroscopic 

 binaries. 



Shapley. Elements of the eclipsing 

 varialjles W Delphini, S Cancri, SW 

 Cygni and U Cephei. Ap. J. 36 (269- 

 285 with tables). 



7600 VARIABLE STAES, IN- 

 CLUDIXG NEW AND LOST 

 STABS. 



Approximate magnitudes of variable 

 stars. P.A. 19 1911 (441 .504 .567 

 641-642J; 20 (44-45 112-113 17.3-174 

 241-243 315-317 383-385 458 511-512 



