KEPORTS OF ASTJ^ONOMICAL OUSKRVATORIES. G81 



CiiAPn/rEiMX', Mexico. 



Xafional Obscyvatory. 



Longitude from Greeuwicli, ()'' 30'" 38'M*4 W. 

 Latitude, 19° 25' 17".5 X. 

 Director: A. Anguiano, 1S78. 

 Projected in 1876 ; established in 1878. 



CHRISTIA^'IA, Xoricay. 



TJniversitaU Stcrnwarte. 

 • 



Longitude from Greenwich, 41*™ 53^65 E. 



Latitude, 59° 51' 43".7 X. 



Authority for hititude and longitude : Beschreibung uud Lage der 

 Uuiversitiits Steruwarte in Christiania: ^'erhandlung der funften allge- 

 meinen Coufereuz der europiiischen Gradmessung, p. 300. Expe^L 

 chronom. executee en 1811 entre Alton and Greenwich. 



Directors : C. Hansteen, 1815 ; 

 C. Fearnley, 1873. 



Observer : 11. Geelmuyden. 



Watchman: J. Thronden. 



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 Frau- 

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

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

 ing i)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, 4i 

 inches; magnifying power, 50-290. Wire micrometer and ring mi- 

 crometer, (c') Eefractor: Makers, G. Merz & SiJiiNE ; objective, 7 

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

 read by 2 Noniers each to 4^^ and 10". Wire uucrometer. 



{(1) Small universal star-spectroscope by ]\[erz, a vision directe. 



{(J) Clocl^s: one sidereal : pendulum, by Kessels, 1305; one mean time^ 

 by Urb. Jurgensen og Sonner (for the bitilnr) : one by L. L A:\rTVc.RK 

 (for the uniflhir) ; F in the magnetic building. 



{h) Chronometers : mean time ; (Box) Kessels, 1259 ; (Pocket) Kks- 

 SELS, 1280 : one sidereal ; Dent, 2103. 



(?•) Unifilar magnetometer, by Meyerstfin; bitilar magnetometer, 



