BIIiLK^GRAl'IIY. 761 



Object Glasses. 



('(•OKI-; (T.) A: Sons. Adjustnniil .iii'l t<'stiiii;- of 1elcsr<)]>ic object i\cs. O-fl'J p. 



il. Xvo. York, 18!n. 

 8riTT.v (K. .].) Note on sonic jdiotonu'tiif expoiiiiunls conut'itcd with tlic:ii>pli- 



cation of the law of limit inii apertures to small ol)Ject -glasses, il. Month 



Not.. .">!': IS-.-. 1. IS! 11. 



Observatories. 



(iii.L(I).) Astronomer's work in a modern obsej'va toi y. Ohsry.. 11 : ;>.">.">, oTO. 108. 



1891. 

 .1 AllliESBEKUii ri'; del' Sternwarte fiir iS'.K). Xiil jsclir. d. astron. (li'sellscli., 



26:83-16!). ISUl. 

 Jahke.sijkkh'HTE (ler Sternwarte fiir 18!tl. \'rtlJK(lii-. d. ast ton. < iesidlsch., 



27 : 72-166. 1892. 

 New. M.I. (H. V.) Notes on \ isits to some Ameiican oliservalories. ()l)sry., 



14: l.-i2, 188,221. 1891. 

 PlCKERlX<; (W. H.) Astronomical possibilities at con si derail] e alt it nde.s. Astron. 



Xachr., 129: 97. 1892. 

 . Astronomical ])ossibilities at consi<leral>!e altitiub^s. ()bsry., 1."): 283-6. 



1892. 

 Proceedixg.s of observatories [1S90]. Mouth. Not.. rA : 'iOS-Ht;. 1S91. 



. Same, 1891; Month. Not., 52: 243-69. 1892. 



Uptox (W.) Ancient and modern observatories. Sid. Mess., 10:481-9. IS'll. 



Optics. 



Steixheil (A.) and Voit (E.) H.audbuch der an.uc\vandt<'n < )]>tik. 1 liaiul. 

 314 p. 8vo. Leipzig, 1891. 



iiVr. 6)/ ("lew (II.) r.ib. Astron. Soc. Paeitic. i-.'M. 1892. 



Orbits. 



Fabritii'S (W.) Leichte Methode der liahubestimumng mit Zugrundelegimg 



des Princeps von <;ibbs. Astron. Nacdir., 128: 225-8. 1891. 

 . Yerhiiltuiss des I)reiocl\S znni Sector der Kegelschnitte. Astron. N'achr., 



129:49. 1892. 

 . ^Yeitere Anwciidniiiicn des (iiblis' sclien l*rinci])s. Astron. Nachr., 128: 



321-8. 1891. 

 Radau (R.) Reinar(|ii<'s r<;latives a la. theorie des orbil,(>s. Hull. Astron., 9: 



321-40. 1892. 

 S(MiUl/rz (E.) Anwendunu' der llaniiltou' s( hen ])artielleii Ditfereiitialgleicliung 



bei der Bahnbestimmung eiues von einem homogeneii S))h.'iroid aiigezogenen 



I'unktes. A.stron. Nachr.. 127: 26.5-!K). 1891. 

 SEAiiEE ((J. M.) Comi)utatioii of )»laces in eccentric ellipsc^s and ]jyp(;rbolas. 



Astron. Jour. 11 : 8it-i)2. 1S92. 

 Y()(;el (R.) Methode fiir li.ihiibcstimmung. .\stron. Nachr., 129:37-44. 1892. 



Parallax (Solar). 



ArWEHS (A.) Souneu|iaralla\e. iiacli den I lelionieterbeobaclituugen der deii I sclien 

 Veniis-Expcditioneu von 1874 iind 1882. Astron. Nachr., 128: 32!t-:!8. 18!)1. 



ITaee (A.) Solar ])arallax and the mass of th<! earth. Astron. .lour. 11: 20. 

 1891. 



IIakkne.s.s (W.) Solar ]iarallax and its related constants. lOltp. Ito. Wash- 

 ington. 1891. 



Washington ob.sorvatioiis, 188.5 iqip. :!. 



StoXE (E..J.) Notii on some values of th«" sun's mean horizontal ])arallax wliicdi 

 have Ijecn deduced from the transit of X^mns observations made in 1882- 

 Month. Not., 52: 124. 1892. 



