Astronomical 0B,sf:itvAT0EiK.s. 423 



Fkoment. 2. Linear dividing engine by 1^'roment. 3. Linear divid- 

 ing engine by Elliott BiiOTHERS. 4. Pbotograpli measuring machine 

 by Geubb. o. Balance by Oertling. G. Five 2 meter and one IO- 

 meter bars; Grubb. 7. Two comparator microscopes and long stone 

 table. S. Ten-inch wheel cutting engine, Swiss; Jenssen & IIensen. 



(/) L Sprengel pump six end on and many Geissler tubes. 2. Air- 

 pump and apparatus. 



(Zr) Various photographic apparatus. 



(/) A large assortment of electrical and electro-magnet ical appa- 

 ratus. One standard and one marine barometer, Negretti & Zumbra. 

 Various thermometers. Seven-inch spherometer, 1 part=y(jiyo inch, 

 Yo^,L___th by estimation ; 4 inch si)herometer; both by IIilger. Arith- 

 mometer by Thomas de Colmar; six places. Arithmometer by 

 TnoMAS DE Colmar ; ten places. Foucault siderostat byEiCHENS; 

 1() inch mirror (and a spare one), silver in glass, by A. 1\L\RTIN. Silber- 

 mauii heliostat by Dubosoq. Ileliostat by Buownino. King's baro- 

 graph and aneiiiograph by Casella. Binocular microscoi)es by Smith 

 & Beck and Boss. Pohiriscope by Ladd; 10-inch, (5-inch, and 4-iiich 

 induction coils by Aprs. A large collection of cut crystals; also dif- 

 fraction apparatus by Sciiwerd. 



Durban (Natal), Africa. 



Ohserraiorji. 



Longitude from Greenwich, 2^' 2'" 1.18" E, 



Latitude, 29o 50' 47.4" S. 



Authority for lougitudt^ and latitude: A. LANCASTER, Liste Generale 



des Observatoires et Astronomes, 1SS7. 

 Director : E. Neisson, Government Astronomer. 



Durham, England. 



University Observatory. 



Longitude from Greenwich, G"' 19«.75 W. 



Latitude, 54° 4G' G.2" N. 



Directors : Temple Ciievallier, 1840. 



Samuel Waymouth, 1872. 



Robert John Pearce, 1873. 

 Founded by subscription, 1840. First observations made in 1842. 

 The observatory is under the general superintendence of the professor 

 of mathematics in the University of Durham. 



DtissELDORF, Prussia. 



^Stcrmcarte [formerly at Bilk near DF/sseldorf). 



Longitude from Greenwich, 27'" 5« E. 

 Latitude, 51° 12' 25" N. 



Authority for longitude and latitude, "Astronomische Nachrichten," 

 G43, nnd " Berliner Jahrbuch." 



