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either instrument the circles read sufficiently for the finding of objects.The driving-clock has, in addition to the usual governor balls, a second-ary control of a pendulum in electrical connection with a standardclock.
Up to 1870, when the present equatorial was erected, a transit circleof .3 j inches aperture was mounted in the observatory. At that timethe principal instrument the observatory contained was an 8-incli re-fractor by Alvan Clark , mounted equatorially by Cooke, of York.
There is a fine sidereal clock by Arnold, and various spectroscopesfor use, with the telescopes, on the sun and stars; and there has beenrecently added a spectroscope, with Iceland spar prism and quartzlenses, for photography of spectra of stars.
Underneath the observatory are two rooms, one devoted to chemistryand photography, the other to physical experiments in connection withspectrum analysis.
I. Obserratoire des College de la Compagnie de Jesus.
Longitude from Greenwich, 18 m 48 s E.
Latitude, 50° 53' 27" K".
Authority for longitude and latitude : A. Lancaster, Listo Generaledes Observaloires et Astronomes, 1887.
Director : J. Tiiirion, S. J.
II. Private Observatory of Dr. Terby.
Longitude from Greenwich, 18 m 51 8 E.
Latitude, 50° 52' 40" U.
Authority for longitude and latitude: A. LANCASTER, Liste G6n6raledes Observatoires et Astronomes, 1887.
Director: Ur. Terby.
Sternwarte.
Longitude from Greenwich, 42 m 45.7 s E.
Latitude, 53° 51' 31.2" N.
Director: Ed. Thiel.
Founded in 1800 as an annex to the navigation school. The tower,with a revolving turret of 20 feet diameter, stands upon the rampartsto the south of the town 03 feet above the level of the Baltic.
Observatory.
Longitude from Greenwich, 5 1 * 23 m 24.02 s E.
Latitude, 20° 51' 10" FT.
Authority for longitude and latitude: Annuaire des Bureau des Longi-tudes, 1884, p. 412.