ASTRONOMY. 205 



Meteors — Continued. 



Dknn'IN(;(W. F.) Ileightsof the-b;illHJin(lshootin<;8tarH. Month. Not., 48 : 112. 

 Kleiukk (J.) Vertheiliini;' der Mcteoro in Mcteorschwiirujon. Astrou. Nachr., 



118: :545. 

 Meunikk (S.) Kapports niutnels don m6t6orites et des (^toilos lilautes. Compt. 



Kend., 107: 8:54. 

 DK TiLLO (A.) Keclicichivs siir la repartition des points radiants d'aprfes los inois 



de rauu6e ot d'apres los coordonnees cdlestos. Bull. Astron., 5 : 237-:248, '28;5-Ul. 

 Meteors (Observations of). S<-e, also, Mkteous. 



Dknnixg (W. F.) Height of a. Perseid tire-hall. il. Month. Not., 49: 19-21. 



Height of a Leonid tire-hall. il. Mouth. Not., 49 : (5G. 



Leonid meteor-shower, 1888. Nature, 39 : 84. 



Micrometers. 



CoMSTOCK (G. C.) Value of one revolution of a micrometer screw. Sid. Mess., 

 7 : :U3-409. 



Kempf (P.) Ueher Laniellon-niikromcter. Astron. Nachr., 119:33-38. 



OUDE.MANS (.J. A. C.) Condition that in a double-image micrometer the value 

 of a revolution of the micrometer screw may he independent of the accommo- 

 dation of the eye. Moutl). Not., 48 : 334. 



TUPMAN' (G. L.) On the cross reticule, il. Month. Not., 48 : 96-103. 



Description of a cross-bar micrometer. Obsry., 11 : 58-61. 



Mirrors. 



Common (A. A.) Testing polished thit surfaces. Month. Not., 48: 105. 

 Mad-SEN (H. F.) Notes on the process of ])olishing and tignring 18-inch glass 

 specula by hand, and experiments with Hat surfaces. Jour, and Proc. Roy. 

 Soc. N. S. Wales, 20:79-91, 1886. 



liev. by Common (A. A). Niuuie. 37 : 382. 

 Mitchel (Ormsby Mcknight) [1809-'621. 



MiTCHEL (F. A.) Ormsby Macknight Mitchel, astronomer and general: a bio- 

 graphical narrative. 8 -f- 392 p. portr. 12mo. Boston, 1887. 



Moon. See, also, Luxar theory. 



Elgku (T. G.) Sir William Henschel's observations of volcanoes in the moon. 



Obsry., 11 : 377. 

 Grensted (F. F.) Theory to account for the airless and waterless condition of 



the moon . . . 8vo. Liver])ool, 188H, 

 HOLDEN (E. S.) Sir William llerschel's observations of volcanoes in the moon. 



Obsry., 11:334. 

 Hunt (G.) Sir William llerschel's observations of volcanoes in the moon. 



Obsry., 11:403. 

 Thukein( — ) Elemeutare DarstellungderMondbahu. 4to. Berlin, 1888.. (M. 1) 

 Williams (A. S.) Sir William llerschel's observations of volcanoes in the nioon. 



Obsry., 11:378. 

 WoLK (M.) Aufnahmo von Jlondphotographien. il. Siri us, 21 : 97-100. 

 Moscovy Observatory. 



Annates d(! I'observatorie do Moscou . . . 2 s., v. 1. 2. livraison. 128 p. 6 pi. 



4t(). Moscow, 1888 (M, 6) 



Nadir. 



Perigaud (E.-L.-A.) Nouveau bain do mercuro pour I'observation dn nadir. 

 Compt. Rend., 106:919-921. 



01>servations d'iltoiles ]»ar rdllexion et la mesuro de la flexion dn corclo do 



Gainbey. Compt. Rend., 107:613,. 

 Natal Observatory. 



Report of the superintendent . . . 1887. 26 !>. 4to. [n. p., n. d. ] 



