REPORTS OF AMERICAN OBSERVATORIES. 5G5 



(d) Observations of a few double stars discovered by S. W. Burn- 

 ham, Esq., of Chicago. 



Locution of observatory : (City) Rochester ; (County) Monroe ; (State) 



New Voile. 

 Name of observatory : "Warner Observatory." 

 Longitude from Greenwich, 77° 51/. 



Latitude, 43° 8' 17". 

 Authority for latitude and longitude: Signal Service officer. 



I. Personnel: 

 Director, Lewis Swift. 



II. Instruments : 



{^Equatorial instruments : Makers, AlvAN Clark & Sons (construct- 

 ing) aperture of objective, 1G inches; magnifying powers of eyepieces, 

 from 45 to 2,000. 



(c') Altitude azimuth 4 J inches, by Friz; powers from 25 to 432. 



III. Observations during the past year: 



(&) Almost exclusively in charting nebulae and searching for comets. 

 Comets I (Swift's), II (Palisa's), and III (Hartwig's) were severally 

 observed. Several nebulae heretofore overlooked have been found and 

 recorded. The " brick-red" spot on Jupiter and changes in the color of 

 his belts have been observed. 



IV. Work proposed for the coming year (1880) : 



With 16-inch equatorial, when mounted (about July 1), discovering, 

 observing, and cataloguing nebula) on moonless nights, and on double- 

 star work when moon interferes with nebular work. The solar disk will 

 receive a share of my attention with a view to detect the transits of intra - 

 mercurial planets. With 4.^-inch, comet-seeking as heretofore. 



VT. Additional information: 

 During the year I have discovered one new comet (Comet 1, 1870), viz : 

 on the morning of -June 17, civil time, with elements unlike any hereto- 

 fore recorded. At the time of discovery I suspected its coraetary char- 

 acter, bul soon clouding up I was unable to decide it until the morning of 

 the 21st. Immediate notification was given to Professor Laird, who 

 caused its discovery and its position to be cabled to Europe. The cus- 

 tomary notifications were also given to astronomers in (his country. It 

 was a faint cornel during the whole period of its visibility. I several 

 times lost and recovered it, and bydetermined effort was able to observe 

 it as late as September 17-PS, after which 1 was unable to follow it. 



Location of observatory : (City) Saint-Louis; (County) Saint Louis; 

 (State) Missouri. 

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