558 REPORTS OF AMERICAN OBSERVATORIES. 



IV. Work proposed tor the coming year (September, 

 1S79, to September, 1880) : 

 Of Mars at opposition for parallax, comets, and occultations, &c.; 

 meridian circle, for redetermination of latitude, &c. ; the work of in- 

 struction leaves but limited opportunity for other work. 



Location of observatory: (City) Newington; (County) Hartford; (State) 

 .Connecticut. 



Name of observatory: Private observatory of D. W. Edgecomb. 

 Longitude from Washington, 5° 21' 30" E. 

 Latitude, 41° 44' 0". 

 Authority for latitude and longitude : Difference from Hartford State- 

 house, Coast Survey. 



I. Personnel : 

 Director, D. W. Edgecomb. 

 Assistants, None. 



II. Instruments : 



(c) Equatorial instruments : Makers, A. Clark & Sons ; aperture of 

 objective, 0.4 inches; magnifying powers of eyepieces, various up to 

 2,000. (See general description.) 



(g) Clocks: Meantime; Swiss regulator, seconds. 



VI. Additional information: 

 This observatory consists of a small frame budding, with dome 12 

 feet inches diameter, upon the grounds of the owner, covering an equa- 

 torial telescope. The latter rests upon a granite pedestal, weighing 

 about 1,500 pounds. The mounting is by Young, of Philadelphia, and 

 is of the best workmanship. The declination circle is 13 inches in diame- 

 ter, reading by verniers to 10 seconds of arc. The hour circle is 10 inches 

 diameter, reading by verniers to 4 seconds of time. The graduations 

 are upon silver. The obiect-glass, tube, and finder are by A. Clark & 

 Sons. The aperture of the object-glass is 9.4 inches, with a focal length 

 of 121 inches, and is without doubt the finest specimen of the skill of 

 Mr. Alvan Clark. Under the most rigid tests, its figure is found to 

 approach very closely to absolute perfection. It is shown also by the 

 vision it gives of the closest double stars and the faintest companions 

 to bright stars hitherto discovered. Among the former, y 2 Andromeda}, 

 X Cassiopeaj, and -q Coronas in its present position (September, 1879) 

 may be mentioned, and of the latter class, the companions to y Lyrse, 

 C Aquiline, e and p Hydrae, the star closely following the attendant to 

 Eegulus, and under very favorable circumstances the 2" companion to 

 e Coronse. The instrument has been used for general observations of 

 the stars, moon, and planets, other occupations preventing the owner 

 from carrying on at present any more regular work. 



