420 ASTRONOMICAL OBSERVATORIES .

Directors: J. Otto, 15G0-15S0.

M. Jostelin, 1580-1609.

L. Brunner, 1609-1037.

Til. Hasell, 1G37-1GG1.

Tor. Beutel, 1GG1-1720.

B. Michaelis, 1720-1740.n. Eulenburg, 1740-1743.

E. Walz, 1743-1747.

J. Mayen, 1747-17G8.

E. Zeiter, 17G8-1783.

G. Kohler, 1783-1801.

S. Seiffert, 1801-1818.

A. Schmidt, 181S-1S28.

G. Lohrmann, 1828-1840.

K. Blochmann, 1840-1869.

A. Drechsler, 18G9.

The Boyal Mathematical-Physical Institute, an astronomical andmeteorological observatory, together with a considerable collection ofastronomical, physical, and mathematical instruments, dating princi-pally from the xvi, xvn, and xvin centuries, had its origin in thecabinet of art which was founded in 15G0 by August I, Elector of Sax-ony.

II. Private Observatorium des Herrn B. von Engelhardt.

Longitude from Greenwich, 54 m 54.80 s E.

Latitude, 51° 2' 1G.80" N.

Director : B. von Engelhardt.

III. Private Observatorium des Ilerrn Dr. Hugo Guericke.

Longitude from Greenwich,-.

Latitude , —-.

Director: Dr. Hugo Guericke.

Drontheim, Norway .

Observatory.

Longitude from Greenwich, 41 m 49 s E.

Latitude, 63° 25' 48". N.

Authority for longitude and latitude : Oonnaissance des Temps, 1884,p. xx.

Dublin, Ireland .

Dunsinlc Observatory.

Longitude from Greenwich, 25 m 21 s W.

Latitude , 53° 23' 13" N.

Authority for longitude and latitude: Dr. Brunnow.