628 REPOETS OF ASTRONOMICAL OBSERVATORIES. 



eters. By lengthening the eye- tube as described in Dick's ''Practical 

 Astronomer" this power can be about doubled. 



[g) Cloclcs : A good watch, and clock of ordinary construction. 



Observations during the past year (from October, 1870, to 

 March, 1881) : 



Observations of sun-spots ; keeping a daily map of the sun, on which 

 the positions and number of spots are denoted ; a weather record kept 

 in connection with observations of sun-spots ; also, observations of the 

 principal planets and the moon to detect physical changes; aUo, observa- 

 tions of nebulne and star-clusters, and of double stars, for color. Atten- 

 tion has been given to making naked-eye estimates of the comparative 

 brilliancy of the larger stars. As the result of a great many observa- 

 tions it is found that Arcturus slightly exceeds Capella, and that Vega 

 is considerably inferior to both those named. This winter, for the first 

 time, Bigel has seemed slightly superior to Betelguese. 



Work proposed por the coming- year (1881) : 



Continuation of sun-spot observations in connection with a weather 

 record ; observations of the moon, planets, &c. 



Principal publications of the observatory: 



Many editorial paragraphs and other articles on astronomical subjects 

 in the New York Sun. 



Additional information : 



Since January 1, 1881, a daily record has been kept of the sunset 

 colors and their intensity, on the supposition that such a record may 

 possibly have some value for meteorological purposes. A record has 

 also been kept of meteors and other celestial phenomena. 



Brooklyn, New Yorlc 

 Private Observatory. 



Longitude from Washington, 



Latitude, ? 



Director: W. T. Gregg. 



(c) Equatorial instrument: maker, William T. Gregg; aperture of 

 objective, 6i inches; magnifying powers of eye-pieces, 50 to 600. 



Buffalo, Erie County, JHfeio YorJc. 

 Private Observatory. 



Longitude from Washington, 7™ 21^G5 W. 

 Latitude, 42° 54' 9".5 K 



Authority for latitude and longitude : Eeport for 1862 of the Eegents 

 of University of State of New York. 

 Director: Henry Mills. 



