210 Proceedings of the Royal Irish Academy. 



I hare furtlaer oId served tlie star as follows : — 



1884, Jan. 21, 5-0 magnitude. 



„ 31, 4-85 



„ Feb. 7, 4-7 



„ 10, 4-6 



7> 5> 22, 4"7 ,, 



,, March 4, 4-8 ,, 



„ 17, . . • . . . 5-0 



„ 21, 4-7 



;; >; 24, 4'7 ,, 



,, April 1, 4'8 ,, 



7 4-6 



9 4-5 



„ 19, 4-45 



» 20, 4-4 



„ v 26, 4-6 ,, 



„ May, 12, 4-6 



„ 17, 4-7 



„ 22, 4-6 



„ 28, 4-7 



The above observations were made by eye-estimations with a bino- 

 cular field-glass, ba^-ing objects-glasses of 2 inches aperture, and a 

 power of about 6 diameters. This was the method adopted at Cordoba 

 for determining the magnitudes of the stars contained in Dr. Gould's 

 great work, the Uranometria Argentina, and has been found to give 

 very reliable results when suitable comparison stars are chosen. 



