714 REPORTS OF ASTRONOMICAL OBSERVATORIES. 



InSTRUjMENTS : 



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

 inches 5 divided to 3' ; read by four microscopes to 1" ; aperture of ob- 

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

 ters. 



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

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

 150, 330, 476, 666. 



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



{g) ClocJcs: one mean time; maker, Kessels, is^o. 1282: one sidereal; 

 makers, Bareaud, IS'o. 769, and Hohvin, 1^0. 24. 



(/;) Chronometers : uiean time, 89, of different makers: sidereal, 3, of 

 different makers. 



(*) Miscellaneous: one transportable transit instrument of Herbst, 

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

 aperture, 2.7 inches; magnifying power, 100. 



(Zr) 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, Fay e ; 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 Nachrichten," vol. 97, p. 335. 



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

 de I'Acad^mie Imxieriale de St.-Petersboiu'g." 



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

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



Nottingham, England. 

 Alexandria Parle Observatory. 



Longitude from Greenwich, ? 



Latitude, ? 



Director: ! 



Odessa, Russia. 



Sternwarte. 



Longitude from Greenwich, 2^^ 3™ 2^3 E. 

 Latitude, 40o 28' 30" K. 

 Director: '} 



