G40 REPORTS OF ASTRONOMICAL OBSERVATORIES. 



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

 ball is dro|)ped 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 i^lanets and comets. 



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

 require. 



Principal publications of the observatory: 



C. W. Pritchett: Eed spot on Jupiter j published in Monthly 

 Kotices. 



C.W. Pritchett: Method of observation of red spot on Jui^iter; 

 published in Astr. Nach. 



H. S. Pritchett : Discussion of measures of diameters of Mars 5 

 published in Astr. Kach. 



H. S. Pritchett: Discussion of observation on red spot on Jupiter j 

 published in Proc. Am. Assoc. 



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



H. S. Pritchett: Observations comet (e) 5 published in Astr. Nach. 



Hanover, Grafton County, New Hampshire. 



ShattncJi Observatory. 



Longitude from Washington, 19™ 3^5G E. 



Latitude, 43° 42' 15" 2 N. 



Authority for latitude and longitude, Prof, C. A. iouNa. 



Directors : C. A. Young, 1853 ; 



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

 Assistants : 1. George Otis Mitchell 5 



2. Dana Chase Barber; 



3. Sidney Bates Cady. 



Pourided 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 inches (O^'.IS) between the walls. 



Instruments : 



{a) Meridian circle : makers, Troughton & SiMMS ; diameter of 

 circle, 30 inches ; divided to 5' ; read by reading microscopes to 1', 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 5 magnifying powers of eye-pieces, 100 ta 

 1200, 20 in number. 



