58 BIBLIOGRAPHY OF ASTRONOMY: 1887. 



Telescopes — Continued. 



Astronomical telescopes at the Manchester exhibition. Engineering, 44 : 630. 

 Denning (W. F.) Telescopes and telescopic work. .J. Liverp. astron. soc. , 5: 



9, 57, 121, 1.53, 176, 211, 232. 

 ExNER (K.) Aufstellung grosser Instrumente. Astron. Nachr., 117 : 105. 

 Hiscox (G. D.) Limit of available power in great telescopes. Sc. Am., 56 : 



344. Also: Papers Am. astron. soc., 1 : 41-43. 



Astronomical telescopes : their object-glasses and reflectors, il. Sc. Am. 



sup. 9283, 9296, 9312. 



KozK (C.) Instruments a lunette fixe equivalents au cercle meridien ou a I'equa- 

 torial. Compt. Rend., 104: 1090. 



Nouveaux moyens de reperer I'axe optique d'une lunette par rapport a la 



verticale. Ibid., 1260-1263. 



Young (C. A.) Great telescopes. Forum, 4 : 78-86. 

 Telescopes (Reflecting). 



Crossley (E.) Centering tube for reflecting telescopes. Month, not., 47 : 274. 

 McLaren ( — ) Images formed by reflecting mirrors, and their aberration, il. 

 Month, not., 47: 395-412. 



Madsen (H. F.) Notes on the process of polishing and figuring 18-inch glass 

 specula by hand, and experiments with flat surfaces. Eng. mec, 44: 515, 

 536. 

 Tennant (J. F.) Notes on reflecting telescopes, il. Month, not., 47 : 244. 

 Temple observatory. 



[Report for 1886.] Month, not., 47 : 157. 

 [Report for 1887.] 3 p. 8vo. [n. p., n. d.] 

 Termoli. 



PoRRO (F.) Determinazione della latitudine della stazione astronomica di 

 Termoli ... 23 p. 8vo. Torino, 1887. 



Repr.from : Atti d. r. accad. d. se. d. Torino, 22. 

 Thollon (L.) [ -1887]. 



Janssen (J.) [Obituary notice.] Compt. Rend., 104 : 1047. See, also, L'As- 

 tron., 6 : 194. 

 Three bodies (Problem of). See, also. Mechanics (Celestial). 



Brendel (M.) ijber einige in neuerer Zeit angewandte Formen fiir die Dift'er- 



entialgleichungen im Probleme der drei Korper. Astron. Nachr., 116: 



161-166. 



Harzer (P.) Untersuchungen iiber einen speciellen Fall des Problems der dr.?i 



Korper. 156 p., 1 pi. 4to. St. Petersburg, 1887. (M. 4. -50.) 



Tides. 



DuFouR (C.) Les courants de la mer et I'attraction de la lune. L"A!tron., 

 6: 48. 

 Time (Determination of). See, also. Interpolation. 



D'AiiBADiE (A.) Sur la maniere la plus commode de trouver I'heure. Compt. 

 Rend., 104: 1214. 



