BIHLIOGKAI'IIV. 755 



Latitude t \:iii;iti()u ot) — Coiitiniifd. 



TiiAtKERAV (W.Ci.) ,iu<l I'liriH T (U. H.) Variation of latitude as iudicatt'd by 



recent observations at . . . (Jreenwich. ^^onlll. Not., 53: 2-11. 1892. 

 TiioM.sox (W.) Variations of short i»erio(l in tlio latitndc Nature. (Dec. 3, 



1891.) AhHir. : Pub. Astrou. 8oc., Pacilic, 1 : S.k lS!t2. 

 Wanacu (K.) Sclnvankungen der Polhilbc von rnlkowa, 1S!M) und l.siU. il. 



xVstron. Nadir., 129: 329-34. 1892. 

 . AVileitung der Polliiihenschwankuni;t'n aiis iiltcrcn i'ulkowacr licobacli- 



tnnjien iui crsten Vortical. Astron. Naclir.. 130: 2ir)-.")2. 1892. 



Lenses. 



lU'H.MiAM (.S. W. ) New enlarniiiy ](ln)lo^|•aphic buis. Astron. and AHtroi)liys., 



ll:5.')8-62. 1892. 

 Hoi.l>EX (E.S.) Who discovered the ojttical jiroperties of lenses? Pub. Astrou. 



Soc, Pacific, 3: 133-10. 1891. 



Levels. 



IIall(A.) The si. irit level. Sid. Mess., 10: 187. 1891. 

 Turner (H. H.) N'<-\v forms of levels. ISIonth. Not., 52: 52-6. 1891. 

 Lick Observatory. 



lloi.DKX (1>. S.) Note ou the early history of the Lick Observatory, il. Put). 



Astrou. Soc, Pacific, -1 : 139-.5(t. 1892. 

 . The jL^reat telescope; it.s acconi])lishnients for srieuic diirin;^ the jiast 



year. il. San .lo.se Daily ^lercnry, .Jan. 1.1892. 

 SiiiNX (M. "W.) The Lick astronomical departnu'ut of tlie [Jniversity of (!ali- 



fornia. 22]). 11. 8vo. Sau Fraucisco, 1892. Rcpr.from: Overland Mouth.. 



Nov.. 1892. 



Light. 



LaNGLEY (S. p.) Lnertiy and vision, il. Mem. Xa-fl Acad, hc, 5: 7-lS (V. 5, 

 1 nieiu.). 1891. 



Lunar theory. 



Hi'.owx (E. W.) Determiuation of a certain class of ine(|ualities i)i the moou'w 



motiou. Month. Not., 52: 71-80. 189L 



. Note on the Innar theory. Month. Not., 52: 408. 1N92. 



('avlev(A.) Note on th(^ lunar theory. Month. Not., 52: 2-5. 1891. 

 Daxckvoortt (A.) Die voin Monde veriirsachte atmospharisciie Ebl)c und 



I'Tuth iu Pezuf>' auf Entfernunj;- nud Stnndenwinkel des Mondes. 51 p. Svo. 



M.i.srdeburo-, 1891. 

 (i()i;i)(>X (J.) Corrections to Hansen's labh's de la lunc. .Monl h. .Not.. .53 : 17-19. 



1892. 

 l».VDAl(R.) Notes relatives a <|uel(|nes ])oiiits (b' la theoi'ie de la lunc. Hull. 



Astron..!'; 3i;i-71. 1S92. 

 . P<Mnar([nes sur certaiues iutjiiilitcs a ionj;ne pc liode dii moiivrment de la 



lune. r.nll. Astron.. 9: 137. 185. 245. l^<92. 

 StoCKWEI.i. (J. \.) Mean an<l secular ni;ition ot' lln- nu)on's perijjjee Astrou. 



.lour., 10: 145 1891. 

 Sroxi". (E..T.) X'eriiication of the expression.s given iu Helannay's lunar theory 



by a direct ditfer(!ntnition an<l substitution in tln' differential eiiuations. 



Month. Not., .52: ()H-70. 1.S9I. 

 TlssKiiAXJ) (F.) NotesurTctat actuel de la th<(.rie dr hi liinr. Hull. Astron., 



X: 181-503. 1S91. 



.• Aeci'Ii'ration s('cnlaire de la lunc d sni- l.a \ ari.ibilil.' du Jour sideral. 



C'(Mnpt. Kend. li:'.:t)()7-9. 1892. 

 TtUNKH (H. TT. ) Systennitic errors of I lie iii iu right asceiisicui. .Month. Not., 



53:11-10. 1892. 



