i 



BIBLIOGRAPHY OF ASTRONOMY: 1887. 59 



Time-services. See, also, Clocks. 



Keeler (J. E.) Time-service of the Liclc observatory. 16 p. 8vo. [North- 

 field, 1887.1 



Repr.from: Sid. mess., 6: 233-248. 



Time (Standard). 



[Adoption of even hours from Greenwich in America and Norway.] Ciel et 



terre, 8 : 55. 

 [Allen (W. F.) & Fleming (S.) Keports on introduction of standard time, 



etc.] Science, 9 : 7. 

 Fleming (S.) [Introduction of new system of time into Canada.] Obsry., 10: 



221. 



Transit observations. 



FiNLAY (W. H.) Probable errors of transit-observing. Month, not., 47 : 427. 



Tycho Brahe. 



BuRCKHARDT (F.) Aus Tycho Brahe's Briefwechsel. 28 p. 4to. Basel, 1887. 



(M. 1.60.) 

 Ucole observatory. 



Vincent (J.) Le nouvel observatoire d'Uccle, pres Bruxelles. il. Ciel et 

 terre, 8: 105-110. 



United States naval observatory. 



Laussedat (A.) Organisation des services astronomiques aux Etats-Unis. 

 Compt. Kend., 105: 488-491. 



Observations made during the year 1883 at the United States naval observatorj', 

 R. W. Shufeldt, superintendent. 483 p. 4to. Washington, 1887. 



Programme of work to be pursued . . . during the year 1887. 1 p. 22<=™x3o"=". 

 [Washington, 1887.] 



Also : Sid. mess., 6 : 165. 



Eefraction tables, U. S. naval observatory, 1887. [Arranged by J. R. Eastman.] 

 37 p. 4to. AVashington, 1887. 



Report of the superintendent ... for the year ending June 30 [Oct. 5], 1887. 

 17 p. 8vo. Washington, 1887. 



Results of meteorological observations made at the IT. S. naval observatory dur- 

 ing the year 1883. 21 p. 4to. Washington, 1887. 



Uranus. 



Lamp (J.) [Observations of physical appearance in June, 1887.] Astron. 



Nachr., 118: 146. 

 Valentiner (W.) Uber die Abplattung des Uranus. Astron. Nachr., 116: 



329. 



Variable star. Algol. 



Barr (J. M.) [Explanation of the variability of Algol.] Obsry., 10 : 320, 388, 



423. 

 MoNCK (W. H. S.) [Cause of the variability of Algol.] Obsry., 10 : 357, 425. 

 Parkhurst (H. M.) The variable star Algol. Sc. Am., 56 : 247. 



