REPORTS OF ASTRONOMICAL OBSERVATORIES. G57 



{fj) Cloclc: one, sidereal; makers, Uond & Son. 

 (/i) One chronometer: mean time; makers. Bliss & Creighton. 

 (/) Mhcellaneous : Small telescopes; one by Clark & So^^s; aper 

 tiire, 3 inches. 



Observations during the past year (from 18S0 to 1881) : 

 (a) Observations for the time. 

 (c) Observations on Saturn. 



(i) The sun is photographed on every fine day at noon. 

 Work proposed for the coming year (1881) : 

 (rt) Observations for time. 

 {&) Observations on planets, especially Saturn. 

 (/) Observations on sun-spots. 



Princeton, Xcic Jersey. 



Observatories of the College of New Jersey. 



Longitude from AVashington, 9"" 34:«.54 E. 

 Latitude, 40° 20' 57".8 K. 

 Director : C. A. Young. 



The Halsted Observatory, which was built in 1870, but never 

 equipped, is being put in order for the reception of the great equatorial 

 of 23 inches in diameter. This magnificent instrument, which is pro- 

 vided for by the liberal subscriptions of friends of the college, is in pro- 

 cess of construction by the Clarks at Cambridgeport. The object-glass 

 is completed, and is a very fine one; the mounting is well under way, 

 and unless something unexpected occurs the instrument will be in posi- 

 tion before January 1, 1882. The telescope will be occupied at first 

 mainly with stellar spectroscopy; and a spectroscope is being con- 

 structed for it by Hilger, of London, under the kind supervision of 

 Mr. Christie, of the Greenwich Observatory. 



The Observatory of the John C. Green School of Science, which 

 was erected and provided with instruments in 1877, remains substan- 

 tially unchanged. A new 3-inch transit, by Fauth was mounted in 

 the west room in 1879, and the Aycrigg tiansit was transferred per- 

 manently to the prime vertical. A reflecting circle by Pistor & Mar- 

 tins has also been added, and a full set of meteorological instruments. 



The principal employment of this Observatory and of Professor 

 Young is in giving instruction in practical astronomy; a little scientific 

 work has, however, been accomplished. During the winter of lS78-'70 a 

 telegraphic connection with Washington was effected, and six nights' 

 observations put the Princeton meridian circle 9°^ 34«. 54 ± 0^02 east of 

 the Observatory dome at Washington. During 1879 and 1880 five inde- 

 pendent series of latitude determinations have been made by two dif- 

 S. Mis. 31 42 



