ASTRONOMICAL OBSERVATORIES.

455

Nicolaev, Russia .

Nicolaevskaia Observatoria.

Longitude from Greenwich , 2 h 7 m 54.1 s E.

Latitude, 4C° 5S' 20.6" N.

Authority for longitude: Telegraphic determination of 1877; for lati-tude, K. Knorre, Astron. Nacli. Vii, p. 261.

Directors: K. F. Knorre, 1821.

J. Kortazzi, 18—.

Founded in 1821; completed in 1826.

Instruments :

(a) Meridian circle : Maker, Ertel, in Munich ; diameter of circle, 38inches; divided to 3'; read by four microscopes to 1"; aperture of ob-jective, 4.2 inches; magnifying power ordinarily employed, 100 diame-ters.

(c) Equatorial instrument: Makers, Repsold & Sons, in Hamburg;aperture of objective, 91 inches; magnifying powers of eye-pieces, 100,150, 330, 476, 666.

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

(g) Clocls : One mean time; maker, Kessels, No. 1282; one sidereal;makers, Barraud, No. 769, and Hoiivin, No. 24.

(h) Chronometers : Mean lime, 89, of different makers; sidereal, 3, ofdifferent makers.

(■ i) 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.

(k) One transportable vertical circle, 11 inches; aperture, 1.9 inches;circle divided to 4'; read by two microscopes to 2".

Nottingham , England.

Private Observatory.

Longitude from Greenwich , 6 m 0 s W.

Latitude, 52° 58' 24".

Director: Tiiomas W. Bush, F. R. A. S.

The observatory is a provisional structure of wood, built in 1S76, andcomprising equatorial room of 12 feet diameter and small transit annex.

Odessa, Russia .

I. Sternwarte.

Longitude from Greenwich , 2 1 ' 3 m 2.5 a E.

Latitude, 40° 28' 36" N.

Authority for longitude: E. Becker and E. Block, telegraphic de-termination of the longitude between Berlin and Odessa in 1876;for latitude: observations with the meridian circle.

Directors: L. Berkewitscii, 1871; 1881.

E. Block, 1873.