CHAPTER II.— T ANDROMEDA. 
29 
relation can be had from the coloration of the variable given by Yendell, 5.2, and 
by the Gesellschaft Committee on Variables, 6.0. 
Besides that here given, three light-curves have been published for the variable 
near maximum. The curve first published by Pickering Astro physical Journal, 
1, 305, 1895, was anomalous in character, consisting of two straight lines meeting 
at the point of maximum. This curve has unfortunately gained some publicity 
and been widely quoted, but seems to lack confirmation. Pickering’s second curve 
n the same journal, 3, 281, is of a different character and agrees with that given 
by Yendell in Astronomical Journal, 15 , 93, also with the curve here given. As 
far as known, no other complete light-curve has been published, as observations 
near minimum have been scarce. Those published by H. M. Parkhurst in the 
Astronomical Journal, vols. 15 and 17, for epochs 53 and 54, number 9 and 8, 
respectively. In Harvard Annals, 37 , 206, the minimum of epoch 38 was observed 
by Reed, who gives seven observations when the variable was fainter than the 
eleventh magnitude. 
The period 284 days satisfies the present set of observations better than the 
shorter period 281 days given by Chandler, Pickering, and the Gesellschaft com¬ 
mittee, and demanded by the B. D. observations of 1855. Hagen gives in the 
catalogue sheet to the “Atlas” the elements of maximum: 
1891 December 14 (2081) -f- 274 E. 
This period is so much too short that the calculated maximum 17 falls at Julian 
day 6739, only nine days after the observed minimum. 
We conclude that at present the period is lengthening. 
