714 EEPOETS OF ASTRONOMICAL OBSERVATORIES. 



INSTRUIMENTS : 



{a) Meridian circle: maker, Ertel, in Munich; diameter of circle, 38 

 inches; divided to 3'; read by four microscopes to 1"; aperture of ob- 

 jective, 4.2 inches; magnifying power ordinarily employed, 100 diame- 

 ters. 



(c) Uquatorial instrument: makers, Eepsold & Sons, in Hamburg; 

 aperture of objective, 9 J inches; magnifying powers of eye-pieces, 100, 

 150, 330, 476, 0G6. 



(/) Chronograph : one of Herbst, in Pulkowa. 



{g) ClocJcs: one mean time; maker, Kessels, No. 1282: one sidereal; 

 makers, Barraud, j^o. 769, and Hohvin, jSTo. 24. 



(h) Chronometers : mean time, 89, of different makers: sidereal, 3, of 

 diflterent makers. 



[i) Miscellaneous : one transi)ortable transit instrument of Herbst, 

 in Pulkowa, for the determination of time in the vertical of Polaris; 

 aperture, 2.7 inches; magnifying power, 100. 



{k) One transportable verticle circle, 11 inches; aperture, 1.9 inches; 

 circle divided to 4'; read by 2 microscopes to 2". 

 Observations during the past year: 



(c) Comets, Schaberle, Hartwig, Faye; Jupiter's satellites and spots. 



(i) Determinations of clock corrections for the investigation of the 

 rates of the naval chronometers. Determination of the coefficients of 

 compensation of the chronometers. 



Principal publications of the Observatory during the 

 year 1880 : 



T. KoRTAzzi : Beobachtungen des Comet 1880 C, published in the 

 "Astronomische Nachricliten," vol. 97, p. 335. 



T. KoRTAzzi: Sur les taches de Jupiter, published in the "Bulletin 

 de I'Academie Imperiale de St.-Petersbourg." 



T. KoRTAzzi: Tables of W. Thomson for the facilitation of Sumner's 

 method at sea, edited in an altered form (Russian). 



KoTTiNGHAM, England. 

 Alexandria Parle Observatory. 



Longitude from Greenwich, ? 



Latitude, 1 



Director: ? 



Odessa, Russia. 



Sternicarte. 



Longitude from Greenwich, 2^ 3" 2«.3 E. 

 Latitude, 46° 28' 36" N. 

 Director: ? 



