374 ASTRONOMICAL OBSERVATORIES. 



(h) Chronometers: Two sidereal; makers, Feodsham, 3451; Bond, 

 236 ; oue thermometric chronometer, Frodsham, 3424. 



(i) Miscellaneous : Comet-seeker and other small telescopes and ap- 

 paratus. 



Cambridgeport, Massachusetts. 



Private Observatory. 



Longitude from Washington, 23" 49* E. (approximately). 

 Latitude, 42o 21' 56" 1^. (approximately). 

 Director: E. F. Sawyer. 



Chicago, Illinois. 



Bcarhorn Observatory. 



Longitude from Washington, 42"^ 14.69* W. 

 Latitude, 41^ 5'J' 1" K 

 Directors : T. H. Safford, 1865. 

 Elias Colbert, 1874. 

 G. W. Hough, 1879. 



Annexed to the university. Founded by subscription in 1822. 

 Instruments: 



(a) Meridian circle : Makers, Eepsold & Son ; diameter of circle, 40 

 inches; divided to 2'; read by 4 microscopes to 0.1"; aperture of object- 

 ive, 6 inches ; for observations of the sun, aperture employed, 3 inches. 



(c) Equatorial instrument : Makers, Alvan Clark & Sons; aperture 

 of objective, 18 J inches ; magnifying i)owers of eye-pieces, positive, 120, 

 190, 287, 385, 900; negative, 135, 225, 450, 900. 



(/) Chronograph: G. W. Hough; cylinder recording. 



{g) Clocks: One mean time ; makers, Howard &Co. ; Graham es- 

 capement, mercury pendulum ; one sidereal ; makers, Charles Gort- 

 ner & Co., London ; Graham escapement, mercury pendulum. 



(70 Chronometer: Sidereal; makers, Bond & Son. 



{i) Misccllaneoiis : Signal mean time clock for transmitting time sig- 

 nals. 



Cincinnati, Ohio. 



Cincinnati Observatory. (See Mount Loolout.) 



Clinton, New York. 

 Litchfield Observatory of Hamilton College. 



Longitude from Washington, 6«» 34.05* E. 

 Latitude, 43° 3' 17" N. 

 Authority for longitude and latitude: Longitude telegraphically de- 

 termined from Cambridge, Mass. Latitude by stars in prime 

 vertical. 

 Director : C. W. F. Peters. 

 Founded in 1852 by subscription; completed in 1855; central edifice 



