24 BIBLIOGRAPHY OP ASTRONOMY: 1887. 



Double stars (Measures of) — Continued. 



Engelmakn (R.) Doppelsternmessungen. Ibid., 17-30. 



Hough (G. W.) Catalogue of 209 new double stars discovered with the 18^-inch 



refractor of the Dearborn observatory. Astron. Nachr., IIG : 273-304. 



Also, Reprint. 

 Jedrzejewicz (J.) Mesures micrometriques d'etoiles doubles, [1882-80.] As- 

 tron. Nachr., 116: 177-186. 

 Lamp (£.) tJber systematische Beobachtungsfehler bei der Bestimmuiig der 



Parallaxe der schwacheren Coinponente des Doppelsterns 2' 2398. Vrtljschr. 



d. astron. Gesellsch., 22: 342-345. 

 Leavenworth (F. P.) [Proper motion of Lai. 4219.] Sid. mess., 6 : 80. 

 Leavenworth (F. P.) & Muller (F.) New double stars discovered at the 



Leander McCormick observatory. Astron. jour., 7 : 95. 

 Russell (H. C.) Measures of southern double stars made at the observatory', 



Sydney, N. S. W. Month, not., 47 : 473-477. 

 Tarrant (K. J.) Micrometrical measures of 25 double stars. J. Liverp. astron. 



soc, 5: 41, 166, 201,229. 



Double stars (Orbits of). 



Celoria (G.) Nuova determinazione dell'orbita della Stella doppia 2' 3121. 



Astron. Nachr., 117: 379. 

 VON Glasenapp (S.) Bahn des Doppelsterns S Equuloi. Ibid., 116 : 169. 

 Gore (J. E.) Orbit of 12 Lyncis {I 948). lOid., 117 : 290. 



Orbit of 14 (i) Orionis (O. Struve, 98). Month, not., 47 : 206. 



Orbit of 1 1757. Ibid., 478. 



Orbit of jo Eridani. Ibid., 48 : 26. 



Marth (A.) Formulae for correcting approximate elements of the orbits of 

 binary stars. Ibid., 47 : 480-494. Also, Reprint. 



Dresden observatory (Engelhardt's). 



VON Engelhardt (B.) [Report for 1886.] Vrtljschr. d. astron. Gesellsch., 22: 

 99. 



Dresden observatory (K. math. Salon). 



Drechsler (A.) [Report for 1886.] Ibid., 100. 

 Dunecht observatory. 



[Report for 1886.] Month, not., 47 : 158. 

 Dunsink observatory. 



Astronomical observations and researches ... Pt. 6. 99 p. 4to. Dublin, 

 1887. (M. 10.) 



[Report for 1886.] Month, not., 47 : 153. 

 Dusseldorf observatory. 



Luther (R.) [Report for 1886.] Vrtljschr. d. astron. Gesellsch., 22 : 102. 



Ealing observatory (Common's). 



[Report for 1886.] Month, not., 47 : 158. 



