astronomical observatories. 415 



Chkistiania, Norway. 



Uni rer,s it(if,s- Stern wa rte. 



Longitude from Greeiiwicli, 42'" 53. 65^ E. 

 Latitiule, 50° 54' 43.7" N. 



Authoritj' for longitude and latitude : Bescbreibung und Lage der Uni- 



' versitiits-Sternwarte iuCIiristiauia; Yerhandlungender fiinften 



allgemeinen Conferenz der europiiischeu Gradmessung, p. 300; 



Exped. clironom. ex6cutee en 1844 entre Alton et Greenwieli. 



Directors : C. Hansteen, 1815. 



0. Fearnley, 1873. 



Projected in 1815; constructed in 1818; rebuilt at some distance 

 from the first structure in 1830. 

 Instruments: 



{a) Meridian circles : One; makers, Ertel, with objective by Frait- 

 ENHOFER and Utzschneider : diameter, 38 inches; divided to 3', 

 read by 4 microscopes to 2"; aperture of objective, 4 inches; magni- 

 fying ])ower, 180 diameters. 



(/>) Portable transit instrument: PiSTOR «& Martins, makers ; aper- 

 ture of objective. 2 inches ; magnifying power, 80 diameters. 



(c) Equatorial by A. & G. Repsold. Diameter of circles, 30 inches, 

 divided to 3'; read by 2 microscopes to 1"; aperture of objective, 4^ 

 inches; magnifying i)ower, 50-290. Wire micrometer and ring micro- 

 meter, {c') Refractor: Makers, G. Merz & Soiine ; objective, 7 

 inches; magnifying power, 80-000 ; diameters of circles 10 and 14 inches; 

 read by 2 Xoniers each to 4^ and 10". Wire micrometer. 



{d) Small universal star-spectroscoi)e by Merz, a vision directe. 



{(j) Clocks: One sidereal : pendulum, by Kessels, 13G5 ; one mean 

 tiujc, by Urr. Jurgensen og Sonner (for the bifilar): one by L. 

 Lamtvork (for the unifilar); F in the magnetic building. 



{h) Chronometers: Meantime; (Box) Kessels, 1259; (Pocket) Kes- 

 sels, 1280 : one sidereal ; Dent, 2103. 



(i) Unifilar magnetometer, by Meyerstein ; bifilar magnetometer, 

 by Meyerstein inclinatometers, by Gambey, Barlow, Dover ; siphon 

 barometer, by Pistor ; cistern barometer, by Fortin ; thermometers, 

 pluviameters, etc. 



Churts, England. 



Private Observatory. 



Longitude from Greenwich, . 



Latitude, . 



Director: R. Carrington. 

 Discontinued upon the death of Mr, Carrington in 1875. 



