REPORTS OF AMERICAN OBSERVATORIES. 5G9 



IT. Work proposed for the coming year (IS—): 

 The work proposed for the coming year is the same as given above. 

 T. Principal publications of the observatory during 



TEE YEAR : 



1. Maria Mitchell : Observations on the Satellites of Saturn ; pub- 

 lished in American Journal of Arts and Sciences, vol. xvii, June, 1879. 



Location of Observatory : (City) Troy; (County) Bensselaer; (State) 

 New York. 

 Name of Observatory : Williams Proudfit Observatory. 

 Longitude from Washington 13 m 27 s .5 east (nearly). 

 Latitude 42° 43' 52". 

 Authority for latitude and longitude : Latitude determined by observa- 

 tions with the zenith telescope ; longitude by signals from United States 

 Naval Observatory. 



I. Personnel: 



Director, Professor Dascom Greene. 

 Assistant, Palmer C. Kicketts. 



II. Instruments: 



(b) Meridian transit instruments: Makers, E. Kubel, Washington; 

 aperture, 2.5 inches; magnifying power, 60 diameters. 



(//) Makers, Phelps & Gurley, Troy; aperture, 2 inches; magnify- 

 ing power, 30 diameters. 



{<■) Equatorial instruments: Maker, Henry Fitz, New York; aper- 

 ture of objective, 3.5 inches; magnifying powers of eyepieces, 45 to 200 

 diameters. 



({/) Clods: Mean time; maker, Stokell, New York; Howard, Boston. 



(h) Chronometers: Sidereal; maker, J. Fletcher, London. 



(i) Miscellaneous: Sextant; Troughton & Simms, London. 



III. Observations during the past year: 

 From September, 1878, to September, 1879. 



(a) Besides regular transit observations for time, by the director and as- 

 sistant, the instruments have been used by the senior class of the Rens- 

 selaer Polytechnic Institute, for practice in astronomical observation. 



IT. Work proposed for the coming year (1879-'80). 

 This is expected to be similar to the work of the past year. 



Location of observatory : (City) Washington, District of Columbia. 

 Name of observatory : United States Naval Observatory. 



Longitude from Greenwich 5 h 8 m 12 B .09. 



Latitude +38° 53' 38.8". 



