BIBLIOGRAPHY OF ASTRONOMY: 1887. 11 



Chronometers — Continued. 



Gautier (E.) Kapport sur le concours pour le reglage des chronometres, 1886. 



[11] p. 8vo. [n. p., 1887.] 

 HiRSCH (A.) Rapport du directeur de I'observatoire cantonal de Neiichatel 



. . . sur le concours des chronometres observes pendant I'annee 1886. 



28 + 12 p. 12mo. Locle, 1887. 

 Peters (C. F. W.) Einfluss der Luftfeuchtigkeit auf den Gang der Chronome- 

 ter. Vrtljschr. d. astron. Gesellsch., 22: 284-292. 

 Rates of chronometers on trial ... at the Royal observatory, Greenwich. 



7 p. 4to. [London, 1887.] 

 In : Greenw. obsns. 1885. 

 Recherches sur les chronometres etles instruments nautiques. 123 p. 8vo. Paris, 



1887. (M. 1..50.) 



Young (C. A.) [First use of] break-circuit chronometers. Obsry., 10: 140, 



334. 

 Cincinnati observatory. 



Publications of the Cincinnati observatory, 9. Zone catalogue of 4,050 stars for 



the epoch 1885 ... by J. G. Porter. 104 p. 8vo. Cincinnati, 1887. 

 Circle-divisions. 



Repsold (A.) Schreib-Apparat fiir Theilungs-Beyifferung il. Ztschr. f. In- 



strmknd., 7 : 396. 

 Clark (Alvan) [1804-1887]. 



For Biography, see Am. j. sc, 134: 322. Also: Eng. mec.,45: 603. Also: Na- 

 tion, 45: 149. Also: Nature, 36: 476. Also: Science, 10: 96. Also: Sc. 

 "" Amer.,57: 145,213. Also: Sid. mess., 6: 250-253. Also: Sirius, 20: 241. 



For Portrait, see Science, 10: 96. Also: Sc. Amer., 57: 198. 

 Clocks. 



Appel (D.) Freie Schwerkraft-Hemraung der Normal-Stern-Uhr zu Princeton. 



Ztschr. f. Instrmknd., 7: 29. 

 BucKNEY (T.) Note on the performance of the Westminster clock. Month. 



not., 47 : 519. 

 Christie (W. H. M.) Method of regulating clocks. Obsry., 10: 326. 

 Cornu (A.) Synchronisation des horloges de precision et la distribution de 



I'heure. Compt. Rend., 105: 1106-1112, 1209. 

 FoLiE (F.) Sur renregistrement par microphone des battements d'line pendule. 



Bull, de I'acad. roy. de Belg. [1887?] Notice: Bull. asti*on., 4: 291. 

 Gardner (H. D.) F^ifty years' progress in clocks and watches, il. Nature, 



36: 484. 

 "Wolf (C.) Comparaison des divers systemes de synchronisation electrique des. 



t horloges astronomiques. Compt. Rend., 105: 1155-1159, 1211. 



Colored stars. 

 Backhouse (T. W.) Proposed nomenclature for star-colors. Obsry., 10: 234. 

 Chambers (G. F.) [Color of Achernar.] Obsry., 10, 301. 

 Franks (W. S.) Proposed nomenclature for star-colors. Obsrv., 10: 275. 



