Double Stars. 



272 



7500 



Aitken, R[obert] G[raiit]. Xew double 

 stars. San Francisco, CaL, Pub. Astr. 

 Soc. Pac, 15, 1903, ([242]-243). 



■ A new companion to 2 1506, 



and a new naked-eye double star. San 

 Francisco, Cal., Pub. Astr. Soc. Pac, 16, 

 1904, (119). 



Note on ;8 346 = Librae 23. 



San Francisco, Cal., Pub. Astr. Soc. Pac, 

 16, 1904, (144). 



The double star 2 21. 



San Francisco, Cal., Pub. Astr. Sue Pac, 

 16, 1904, ([215]-216). 



On double stars. San Fran- 

 cisco, Cal., Pub. Astr. Soc. Pac, 16, 1904, 

 ([235]-240). 



Xew companions to known 



double stars. San Francisco, Cal., Pub. 

 Astr. Soc. Pac, 16, 1904, (268-269). 



Burnham, S[lierbunie] W[esley]. A lost 

 double star. Pop. Astr., Northfierd,I\Iinn., 

 11, 1903, (250-2.52). 



Campbell, ^[illiam] "\V[allace]. Castor 

 a (juachuple star. San Francisco, Cal., 

 Pub. Astr. Soc Pac, 16, 1904, (260-263, 

 with text fig.). 



Clarke, Miss Agnes M. Castor as 

 a ([uadruple system. Observatory, London, 

 28, 1905, (209-212). 



Hussey, W. J. Duplicity of 31 j3 Leonis 

 Minoris. Sau Francisco, Cal., Pub. Astr. 

 Soc Pac, 16, 1904, (270). 



Lewis, Thomas. Some interesting double 

 stars (continued). Observatory, London, 

 28, 1905, (249-251). 



Roberts, Alexander W. Apioidal binary 

 star systems. (Extract from address, Brit. 

 Ass.)' Observatory, London, 28, 1905, 

 (407-409). 



Schroder. R[ichard]. Sirius. Xatur 

 u. Kultur, Miincben, 2, 1905, (257-262). 



7610 OBSERVATIONS. 



Greenwich Royal Observatory. 

 Micrometric measiu-es of double stars, 1 902. 

 Greenwich Obsns., 1902, 1904, (19-47). 



Aitken, R[obert] G[rant]. Recent 

 measures of e Hydrje AB. San Francisco, 

 Cal., Pub. Astr. Soc. Pac, 16, 1904, 

 (118-119). 



Measures of one himth-ed and 



fiftv-five new double stars. Berkeley, Lick 

 Obs., Univ. Cal. Bull., No. 61, [1904], 

 (6-18). Separate. 30.5 cm. 



Barnard, E. E. Observations of the 

 companions of Sirius and Procyon, made 

 with the 40-inch refractor. Astr. J., 

 Boston, Mass., 23, 1903, (132). 



Observations of the star 



Krueger 60, made with the 40-inch tele- 

 scope'. Astr. J., Boston, Mass., 23, 1903, 

 (169-172, with text fig.). 



Doolittle, Eric Measures of Sirius, 

 I Bootis, and F. 70 Ophiiichi. Astr. J., 

 Boston, Mass., 23, 1903, (177). 



Espin, T. E. Micrometrical measures 

 of double stars. London, Mon. Not. R. 

 Astr. Soc, 66, 1906, (141-145). 



Greenwich Royal Observatory. Results 

 of micromett'r measures of double stars 

 made with the 28-inch refractor at the 

 Royal Observatory, Greenwich, in the year 

 1904. London, Mon. Not. R. Astr. Soc, 

 66, 1906, (17-32). 



Hussey, "\V[illiam] J[oseph]. Observa- 

 tions of one hundred new double stars : 

 seventh catalogue. Berkeley, Lick Obs., 

 Univ. Cal. Bull., No. 57, [1904], (180- 

 187). Separate. 30.5 cm. 



■ Observations of one hunched 



new double stars : eighth catalogue. 

 Berkeley, Lick Obs., Univ. Cal. Bull., 

 No. 65, [1904], (53-60). Separate. 

 30.5 cm. 



Miller, John A., and Cogshall, W. A. 



IMeasures of double stars. Astr. Nachr., 

 Kiel, 168, 1905, (213-224). 



Double-star measures. 



Astr. J., Boston, Mass., 23, 1903, (167- 

 169). 



7520 LISTS. CATALOGUES. 



COLOURS OF DOUBLE STARS. 

 SPECTROSCOPIC BINARY 



SYSTEMS. SPECTROSCOPIC 



OBSERVATIONS OF VISUAL 

 BINARY SYSTEMS. INVISIBLE 

 COMPANIONS. 



Double stars. [With bibliography.] 

 [Reprint.] Pop. Astr., Northfield, Minn., 

 11, 1903, (299-322). 



Aitken, R[obert] G[rant]. Sixth list 

 of new double stars. Berkeley, Lick Obs., 

 Univ. Cal. Bull., [2], No. "50, [1904], 

 (139-156). Separate. 30.5 cm. 



