CALIFORNIA ACADEMY OF SCIENCES. 



349 



Observations of the "Pons-Brooks" Comet, 



Made during 1883 and 1884, with the Filar-Micrometer, on the 6.4 inch Equatorial of the 



Davidson Observatory, San Francisco. Lat. N. 37 sl 47 / 24"; 



Long. W. 8 hr. 09 min. 42.6 s. 



Notes to Comparison Stars. 



(j.) 

 (1.) 



IP) 



(9.) 

 (U.) 



Pos. 1883.0 

 Pos. 1883.0 

 Pos. 1884.0 

 Pos. 1884.0 



N. P. D. = 60° 34' 56.8" from A. N., No. 2591. 

 N. P. D. = 61° 55' 44.5" from A. N., No. 2572. 

 N. P. D. = 82° 04' 10.0" from Grant, No. 1870. 

 N. P. D. = 108° 13' 16.5" from A. N., No. 2591. 



a = 21h. 9m. 10.22s. 



a =21h. 16m. 29.78s. 



a =22h. 43m. 07.57s. 



a == Oh. 02m. 37.97s. 

 The * is Lalande, No. 47,332. 

 The * is Lalande, No. 257. 



Observers: D , Prof. George Davidson; H., Chas. B. Hill. 

 (The observations are not corrected for parallax and differential refraction.) 



