ASTRONOiMICAL OBSEEVATOKIES. 383 



IlAVERFORD COLLEGE, PENNSYLVANIA. 



Havcrford College Observatory. 



Longitude from WasliiDgtoii, G'" 59.33« E. 

 Latitude, 40° 0' 36.5" K 



Authority for longitude aud latitude: Observatious on moon, culminat- 

 ing stars, and with transit in the prime vertical in the years 

 ] 854-'o5. [The triangulations from U. S. Coast Survey stations 

 give: 



Longitude, 7"' 0.17« E. 

 Latitude, 40° 0' 49.73" N. 



Director: ISAAC Siiarpless. 

 Instruments : 



(a) Meridian circle: One; dianuier of circles, 26 inches; divided to 

 15'; read by 4 microscopes to 2"; aperture of objective, 4 inches. 



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

 aperture of objective, S^ inches ; magnifying powers of eye-pieces, 60 to 

 800. 



(/) Chronograph : Bond's magnetic. 



{g) Clods: One sidereal; maker, Lukens: one sidereal; maker. Har- 

 per; mercurial compensation. 



(i) Zenith instrument : Aperture, 2^ inches; rejuvenated by Faijth & 

 Co., and to be set up as soon as addition is built to observatory, to de- 

 termine our latitude. 



Hudson, Ohio. 



Hudson Ohservatory. 



Longitude from Washington, 17™ 32.06» W. 

 Latitude, 41° 14' 42.C" X. 



Authority for longitude and latitude : Prof. Elias Loomis, LL. D. 

 Director: Charles J. Smith. 

 Instruments : 



(a) Meridian circle : One; maker, Simms, of London; diameter of cir- 

 cles, IS inches ; divided to 5' ; read by 3 microscopes to 1" ; aperture of 

 objective, 3 inches. 



Equatorial instrument: One; maker, Simms ; aperture of objective, 4 

 inches; magnifying powers of eyepieces, 50, 100, 150, 250, 350. 



Clocli: Sidereal; maker, Molineux; mercurial pendulum. 



Iowa City, Iowa. 



Private Ohservatory. 



Longitude from Washington, 57'" 52.5^ W. 

 Latitude, 41o 39' 8" K 

 Director : C. W. Irish. 



