G40 EEPORTS OF ASTRONOMICAL OBSERVATORIES. 



(<) Meteorological observations made three times each day. A time- 

 ball is dropped daily at Kansas City, 105 miles west of the observatory, 

 at mean noon of Kausas City. Clock signals are also sent to the Union 

 Depot, Kansas City, daily at 4 p. m. 



Work proposed for the coming year (1881) : 



1. Continuation of the double-star measures. 



2. Continuation of the observations of planets and comets. 



3. Such meridian work as our time may allow and our wants may 

 require. 



Principal publications of the observatory: 

 C. W. Pritchett: Ked spot on Jupiter; published in Monthly 



]S'otices. 



C. W. Pritchett: Method of observation of red spot on Jupiter; 



published in Astr. ^ach. 

 H. S. Pritchett : Discussion of measures of diameters of Mars; 



published in Astr. Nach. 



H. S. Pritchett: Discussion of observ^ation on red spot on Jupiter; 



l)ublished in Proc. Am. Assoc. 

 H. S. Pritchett: Observations comet {d); published in Astr. ISTach^ 

 H. S. Pritchett: Observations comet (e) ; published in Astr. I^ach.. 



Hanover, Grafton Counti/, JS^civ Hampshire. 



ShatfucJc ObHcrvatory. 



Longitude fiom Washington, 19'" 3^5G E. 



Latitude, 43° 42' 15".2 ^t. 



Authority for latitude and longitude. Prof, C. A. Young-. 



Directors : C. A. YouNG, 1853 ; 



Charles F. Emerson, A. M., 1878. 

 Assistants : 1. George Otis Mitchell ; 



2. Dana Chase Barber ; 



3. Sidney Bates Cady. 



Founded in 1853, through the liberality of G. Shattuck. Consists 

 of a west rotunda and three additions. It has double brick walls and 

 an air-chamber with a space of six iuches (0™.15) between the walls. 

 Instruments : 



(«) Meridian circle : makers, Troughton & Simms ; diameter of 

 circle, 30 inches ; divided to 5' ; read by reading microscopes to V, and 

 micrometers to single seconds; aperture of objective, 4 inches; mag- 

 nifying power ordinarily employed, 120 diameters. 



(c) Equatorial instrument : makers, Alvan Clark & Sons ; aper- 

 ture of objective, 9.25 inches ; magnifying powers of eye-pieces, 100 to^ 

 1200, 20 in number. 



