214 RECORD OF SCIENCE FOR 1887 AND 1888. 



Telescopes — Continued. 



Smith (H. L.) Telcscopea of short focal length. Sid. Mess., 7: 293-296, 3G0. 

 Tennant (J. F.) Note on the defiuitiou of reflecting telescopes, and on the 



images of bright stars on photographic plates. Month. Not., 48: 104. 

 Todd (D. P.) American telescopes. 4 p. 4to. [Philadelphia? 1888.] 

 Repr.from : Encyc. Brit. Amer. Reprint. Vol. 23, Appendix, p. 932-936. 



Temple Observatory. 



Seabroke (G. M.) Report . . . 1888, 3 p. 8vo. [n.p., u.d.] 

 Three bodies (Problem of). 



Charliek (C. V. L.) Ueber eine mit dem Problem der drei Korper verwandte 



Anfgabe. 18 p. 4to. St. Petersburg, 1888 (M. 0.80. 



Harzeu (P.) Argumeute des Problems der n Korper. Astron. Nachr., 120: 

 193-218. 

 Time (Determination of). 



BiGELOW (F. H.) Computation of clock corrections. Sid. Mess., 7: 97-100. 



Time (Standard). 



Bouquet DE LA GuYE (J.-J.-A.) Notesur I'adoptioud'une heure legale en Franco. 



Compt. Rend., 107 : 429. 

 FOREL (F.-A.) L'nniticationdel'henre: I'heure nationale. L'A8tron.,7: 327-333. 

 Laussedat (A.) L'heure uatiouale. L'Astrou., 7 : 454-457. 



Transit instrument. 



BiGELOW (F. H.) An automatic transit instrument. 11. Sid. Mess., 7 : 205-209. 

 BiGOURDAN (G.) Disposition qui permettrait I'eniploi de puissants objectifs dans 



les observations m^ridienues. Compt. Rend., 10r> : 998. 

 Devaux ( — .) Recherches snr la forme des tonrillons d'nne lunette ni6ridienne. 



Bull, astron., 5 : 523-532. 

 FOkster (W.) Theorie des Durchgangs-Instrumentes. In his : Studien zur As- 



trometrie, 50-114. 

 Geelmuyden (H.) Collimatiou des lunettes bris^es. Astron. Nachr., 119: 151, 



183. 

 Gruey (L.-J.) Nouvel oculaire pour les observations ni^ridiennes. Compt. 



Rend., lOG: 585-587. 

 Repsold (.J.) Durchgangs-Iustrument mit Uhrbewegung. Astron. Nachr., 118: 



305. 



Transit observations. 



GoNESsiAT ( F.) Quelques erreurs affectant les observations de passages. Compt. 

 Rend., 107: G47-650. 



Rayet (G.) Recherches sur les erreurs accidentelles des observations do pas- 

 sages dans la m^thode de I'ceil et de I'oreillo. Compt. Rend., 106: 1713-1716. 

 United States Naval Observatory. 



Circular relating to the construction of a new naval observatory. 44 p. 12mo. 

 Washington, 1888. 



Estimate for the purchase of photographic telescope and pointers, and con- 

 struction of buildings for same, for the proposed international project of 

 charting the sky. 4 p. 8vo. [Washington, 1888.] 50th Congr., 2d sess., 

 Honso of Rep., Ex. Doc. 46. 



Report of the Superintendent . . . Juno 30, 1888. 24 p. 8vo. Washington, 

 1888. 



Urania. 



Urania — Volksakademie der Naturwissenschaften in Berlin. Sirius, 21 : 84-88. 

 Variable stars. 



Chandler (S. C.) Period of Algol. Astron. Jour., 7: 165, 177. 



. On tho observation of the variables of the Algol type. Ibid., 7: 187. 



. New variable of long period. Ibid., S: 24. 



