624 REPORTS OF ASTRONOMICAL OBSERVATORIES. 



I. AMERICAN OBSERVATORIES. 



Albany, New YorTc. 



Dudley Observatory. 



Longitude from Washington, IS'" 12^87 E. 

 Latitude, 42° 39' 49".5 K. 

 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. 



I 



Alfred, Alleghany County, Neio York. 



Alfred Observatory. 



Longitude from Washington, 2™ 55^. W. 

 Latitude, 42° 15' 19".8 N. 

 Director : ? 



Alleghany City, Pennsylvania. 

 Alleghany Observatory. 



Longitude from Washingto.n, ll"" 50^84 W. 



Latitude, 40° 37' 47".6 N. ' 



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, 26^ feet (eight meters) 

 in diameter, contains an equatorial. 

 Instruments: 



{b) Meridian transit instrument: makers, Troughton & Sim3IS; 

 aperture, 4 inches; magnifying j)ower, 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- 



