ASTRONOMICAL OBSERVATORIES. 395 



Instruments: 



(a) Aliitudcuzhmith : Makers, Lerebours & Secretan ; diumcter of 

 circles, 10 inches; divided to 10'; read by 4 uiicroscopes to 10" ; aper- 

 ture of objective, 1.^ inches. 



(/>) Meridian tramit instrument: Makers, B. Pike & SoNS; aperture, 



24 inches. 



(f) Equatorial inHtrument: Maker, Merz, of Munich ; aperture of 

 objective, U inclies; luagnifving powers of eye-pieces, 9G to 312 diam- 

 eters. 



{d) Spectroscope: KiucnoFF's 4-prism table spectroscope. 



{g) Clod- : Mean time ; makers, Eitchie & Sons, Boston. 



(h) Chronometer: Sidereal; makers, William BOND & SoN, Boston. 



Phelps, New York. 



Bed House Observatory. 



Longitude from Washington, lli" W. 



Latitude, 42° 58' N. 



Director: William 11. Brooks. 



Instruments : 



(c) A silver-glass reflecting telescope of 5 inches aperture and 50 

 inches focal length, mounted as a Newtonian on alt-azimuth stand. A 

 2iuch reflector, 36 inches focus. Both made by the director. 



{(j) Clock: Meantime; makers unknown ; marine. 



Philadelphia, Pennsylvania. 



Central High School Observatory. 



Longitude from Washington, 7"' 33«.G4 E. 

 Latitude, 3(P 57' 7.5" N. 

 Director: M. B. Snyder. 



Poughkeepsie, New York. 



Vassar College Observatory. 



Longitude Irom Washington, 12"' 38.5" E. 

 Latitude, 41° 41' 18" N. 

 Director: MARIA Mitchell. 

 Observatory was built in 1865. 



Instruments : 



{a) Meridian circle : Maker, YouNG, of Philadelphia ; aperture of ob- 

 jective, 3f inches. 



(c) Equatorial instrument : Object-glass by Clark ; aperture of ob- 

 jective, 12.\ inches; magnifying- power of eye-pieces, 200 to 600+. 



