Theoretical Astronomy. 



133 



1850 



1810 



STRUCTURE OF 

 UNIVERSE. 



THE 



Boss. [Community of motion amonp; 

 several stars of large proper-motion.] 

 Corrigendmii. A.,I. 27 (33, 1 14). Addi- 

 tional notes on the (Jl Cygni-group. t.c. 

 (67). Systematic motions of the stars 

 arranged according to type. t.e. (83). 



Campbell. Hypothetical parallaxes 

 of the brightar stars of Class A. A.S.P. 



Kapteyn. 21272. The milky way 

 and the star-streams. 21274: Evolution 

 der Fixsterne und des Fixsternsystems. 

 (Holliindisch). 



Macpherson. The stellar universe in 

 the light of recent investigations. P. A. 

 20 (500-504). 



Plummer. The motions of the 

 brighter stars of class A in relation to 

 the Milky Way. Lick B. 7 (30-40 with 

 tables). 



Raymond. Mean value of radial 

 cross-motions on the ellipsoidal theory. 

 A.J. 27 (59J. 



Russell. Stars probably belonging to 

 the 61 Cygni group disco veiled by Mr. 

 Benjamin Boss. A.J. 27 (96). 



Weersma. The internal and cloud- 

 velocitirs for groups of stars of different 

 types of spectra. Ap. J. (325-341 with 

 tables). 



Wilson. The Hyades group of stars. 

 P. A. 20 (,359-367 with ff. tables). The 

 real motions of 100 stars of large 

 proper motion, whose radial velocities 

 have been determined. Lick B. 7 (48-69 

 with tables ff.). 



1820 THEORY OF DOUBLE 

 STARS ; CALCULATION OF 

 ORBITS FROM ORDINARY OR 

 SPECTROSCOPIC OBSERVA- 

 TIONS. (Ephemerides see 7530.) 



Hepperger. 21175. Bahnbestim- 

 mung der Doppelsterne und Satelliten. 



Russell. The determination of the 

 orbital elements of ecliijsing variable 

 stars. 1 [and 2]. Ap. J. 35 1911 (315- 

 340 with tables) ; 36 1912 (54-74 with 

 table). Elements of the eclipsing varia- 

 bles W Delphini, W Ursae jj^ajoris, and 

 W Crucis. t.c. (133-155 with tables ff.). 



Schlesinger and Baker. 21814. A 

 comparative study of spectroscopic 

 binaries, 



1830 RESISTING MEDIUM, 



ETHER, TEMPERATURE OF 

 THE UNIVERSE. 



BfiliavskiJ. Das TikhofT-Nordmann- 

 sche Plianomen bei dem Algolverander- 

 liclien RZ Cassiopejae. M.S. Pk. 3 

 (149). ,,Das Tikholl-Nordmannsche 

 Pliiinomen . . . ". t.e. (157). 



Belopolsky. Ueber die radialen 

 Goschwindigkeiten von $ Aurigae in 

 Beziehung zur Frage iiber die Dispersion 

 in Weltraume. M.S. Pk. 3 (101). 20667 : 

 Vitesses radiales relatives de /3 Aurigae 

 et la dispersion de I'espace. (Russ.) 



Brown. The absorption of light in 

 space. (Second paper.) M.N. 72 (718). 



Tichov. Application des filtres selec- 

 teurs a la recherche de I'affaiblissement 

 selectif de la lumiere. M.S. Pk. • 3 

 (31). Etudes nouvelles sur Tapplication 

 des filtres selecteurs la recherche ,de 

 I'absorption cosmique. t.e. (75). 21963 : 

 Les recherches de Tabsorption cosmique. 

 (Russ.) 



1840 MOTION OF SOLAR 



SYSTEM IN SPACE. 



Pickering. The motion of the solar 

 system relatively to the interstellar 

 absorljing medium. M.N. 72 (740). 



Plummer. A letter from Gauss to 



Argelander. (A. N. 4380.) [Geschwin- 

 digkeit der Sonne.] A.N. 193 (261-264). 



Turner. A tentative explanation of 

 the " two star streams " in terms of 

 gravitation. M.N. 72 (387). Second 

 note : The position of the centre of our 



system, t.e. (474). 



1850 THEORY OF VARIABLE 

 STARS, INCLUDING' NEW 

 STARS. 



Guthnick. Wahrscheinlichkeit eines 

 sehr hohen Prozeutsatzes von Verander- 

 lichen mit merklichen Lichtwechsel- 

 Amplituden unter den Heliumsternen. 

 A.N. 191 (169-182). 



Kayser. Ein Versuch zur Erklarung 

 der neuen Sterne durch radioaktive 

 Prozesse. A.N. 191 (421-426). 



Russell and Shapley. On darkening 

 at the limb in eclipsing variables. 

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

 with fig. and tables). 



Vogt. 22020. Der neueste Stern. 



