656 REPORTS OF ASTRONOMICAL OBSERVATORIES. 



May 1, 3, 11 ; September 12, largest grouj) for many years, equal to ^of 

 the suu's diameter ; October 3, and December 4. Drawings were made 

 of the most remarkable spots. 



Hartwig's comet was observed on October 2, the evening of the day 

 of announcement ; also on October 3, 4, 5, G, 7, 8, 9, and 10. On 3d 

 instant it was in the same field with Ali)hecca. Swift's comet was 

 observed November o and 26, December 4. Owing to dense clouds 

 Pennule's or Pechiile's comet was not seen until Decend)er 31, when 

 it was quickly picked up with 2-inch achromatic in E. A. 19^' 39™ 

 N. Dec. 19° 23'. It was also seen January 1, 1881; January 2, 19, and 20. 



Preparations were made to observe the occultation of Mars, March 17, 

 but clouds prevented ; also the partial eclipse of sun December 31, but 

 observations were again frustrated by clouds. 



Work proposed for the coming year (1881): 



Mainly comet seeking; solar jihenomena and the planets will also 

 receive attention. 



Additional inforsiation: 



Descriptive articles on Hartwig's, Swift's, and PE^;nuLE's comets of 

 1880, also remarkable solar spots, have been published in one or more 

 of the following papers: "Scientific American," "Science Observer," 

 "Science," "Eochester Democrat and Chronicle," " Geneva Courier," 

 " Plielps Citizen." 



Philadelphia, Pennsylvania. 



Central High- School Observatory. 



Longitude from Washington, 7"^ 33^04 E. 

 Latitude, 39° 57' 7".5 N. 

 Director: ? 



Poughkeepsie, Dutchess County, New Torlc. 



Vassar College Observatory. 



Longitude from Washington, 12'" 38^5 E. 

 Latitude 41° 41' 18" N. 

 Director : Maria Mitchell. 

 Observatory^ built in 1878. 



iNSTRrUMENTS : 



{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 powers of eye-pieces, 200 to G00+. 



[J) Chronograph: one. 



