406 astronomical observatories. 



Barnet, England. 



Arldey House Observatory (Private.) 



Longitude from Greenwich, . 



Latitude, . 



Proprietor : J. Campbell. 



Basel, Switzerland. 



Physikalisches Iiistitut, Bernoullianum. 



Longitude from Greenwich, 30'" 20^ E. 



Latitude, 47° 33' 40" N. 



Director : Ed. Hagenbach-Bischoff, 1874. 



Tlie institute was founded in 1874, and the astronomical instruments 

 were mounted in 1878. 

 Instruments : 



(a) The Meridian circle, constructed by the Societe Genevoise, with 

 2iinch objective, by C. A. Steinheil. 



(c) The Equatorial made by the " Societe Genevoise pour la construc- 

 tion d'instruments de physique" mounted on an isolated pillar, under a 

 movable dome of 16^ feet (5 meters) diameter. The instrument is pro- 

 vided with a centrifugal regulator, constructed according to Prof. M. 

 Thury's directions, with position micrometer, spectroscope, and camera 

 obscura. 



{(J) Spectroscope. 



{(j) The astronomical clock was constructed by Theodor Knoblich, 

 m Hamburg. 



The mean time is given by means of an electric pendulum, by M. 

 Hipp, in Neuenburg. 



Both clocks conuect with a number of dials in various rooms, and 

 also with the chronograph. 



Basses-Pyrennees, France. 



M. D''Ahl)a(Ue''s Observatoire. 



Longitude from Greenwich, . 



Latitude, . 



Director : . ^ 



Bedford, England. 



Observatory. 



Longitude from Greenwich, 11"' 13^ W. 



Latitude, 52° 8' 28" N. 



Authority for latitude and longitude, Connaissance des Temps, 1884, 



page xiii. 

 Director : . 



