624 REPORTS OF ASTRONOMICAL OBSERVATORIES. 



I. AMEEICAN OBSEEVATORIES. 



Albany, New TorJc. 



Dudley Observatory. 



Longitude from Wasliiiigton, 13°^ 12^87 E. 

 Latitude, 42° 39' 49".5 X. 

 Directors : B. A. Gould, 1854 ; 



O. M. MiTCHEL, 1859 ; 

 G.W. Hough, 1862; 

 L. Boss, 1875. 

 Founded in 1851, by subscription, the principal subscriber being Mrs. 

 Blandina Dudley. Built in the form of a cross, with wings east and 

 west for the meridian instruments. Finished in 1854, and inaugurated 

 in 1856. 



Alfred, Alleghany County^ New York. 

 Alfred Observatory. 



Longitude from Washington, 2™ 55^ W. 

 Latitude, 42° 15' 19".8 K 

 Director : ? 



Alleghany City, Pennsylvania. 

 Alleghaiiy Observatory. 



Longitude from Washington, ll°i 50^.84 W. 



Latitude, 40o 37' 47".6 K 



Director : S. P. Langley. 



Assistant: F. W. Very. 



Founded in 1860 as an annex to the University ; completed in 1867 

 through the liberality of W. Shaw. The dome, 26J feet (eight meters) 

 in diameter, contains an equatorial. 

 Instruments: 



(b) Meridian transit instrument: makers, Troughton & Simms; 

 aperture, 4 inches; magnifying power, 150 diameters. 



(c) Equatorial instrument: maker, Fitz, re- worked by Clark; 

 ai^erture of objective, 13 inches; magnifying powers of eye-pieces, 50 

 to 1200; equatorial carries a 12-inch flat mirror by Clark at south end 

 of its polar axis; also, position filar micrometer, polarizing solar eye- 



