724 EEPORTS OF ASTRONOMICAL OBSERVATORIES. 



Speyer, Bavaria 



Stermcarte des Koniglichen Lyceum. 



Longitude from Greenwich, 33"' 45^6 E. 

 Latitude, 49° 18' 55".4 IsT. 

 (No longer in operation.) 



Stockholm, Stveden, 



Observatory, 



Longitude from Greenwich, 1^ 12™ 14^ E, 



Latitude 59° 20' 33" K. 



Directors : P. V. WargeiSi tin, 1750 ; 



H. NiCANDER, 1776 5 



J. SOANBERG, 1803 J , 



S. A. Cronstrand, 1828 j 

 X. H. Lelander, 1858 ; 

 Hugo Gylden, 1871. 

 Assistants : Aroid Lindhagen ; 

 Freyold Eancken. 

 Founded in 1750. Here Wargentin made that long series of obser- 

 vations on Jupiter's satellites which resulted in the first reliable tables 

 of eclipses of these satellites. 



Instruments : 

 {(t) Meridian circle : makers, Brtel & Son ; diameter of circle, 18 

 inches 5 divided to 3' ; read by 4 microscopes to 1" ; aperture of object- 

 ive, 4i inches (0.107 meters) ; magnifying power ordinarily employed, 

 124 diameters. 



(b) Meridian transit instrument: maker, A. Eepsold; aperture, 2^ 

 inches. 



(c) Equatorial instrument : maker, A. Eepsold; aperture of objective, 

 7 inches ; magnifying powers of eye-ineces, 114, 150, 190, 302, GOO. 



(/) Chronographs : two. 



({l)Cloc1cs: meantime; makers, Molyneux«& Cope; sidereal; makers, 

 Kessels, Sweder. 



[h) Chronometer: meantime; makers, Dent, Linderoth. 



The following is a translation of portions of a report made by Mr. 

 Hugo Gylden in the " Vierteljahrsschrift der Astronomischen Gesell- 

 schaft," 15ter Jahrgang, 2ter Heft : 



Mention has been made in former rejiorts of two extensive series of 

 observations for the jnu^iose of, firstly, to redetermine all the bright 

 stars between 45° N. declination and the K^orth Pole, which are accessi- 

 ble to our instrumeuts ; and, secondly, to furnish a contribution to the 

 knowledge of the mean distances of stars. 



