12 ART. 19. — N. ICHINOHE : 



NOTES. 



1. The period is subjected to an inequality whose law is 



+ 147'" si'n (0°.02-i E + 22G°)+22'» sm (^+216^ 



according to Chandler IV. The symmetry of the light-curve is 

 discussed by various astronomers, lîut possibl}^, it is symmetrical. 



2. The minimum brightness is usually of the magnitude lO'^.O, but there 



was observed by Schmidt on April 14,1882, an excessive darkening 



of the star, •which remained for a whole hour sunk nearly to the 



twelfth magnitude. 



The period varies, but its law is not yet discovered. 



The light-curve is not symmetrical, and there is a secondary uiidnra- 



tion near the minimum phase, 



3. Period certainly subject to an inequality, whose law is not yet 



possible to determine and the deviations from the uniform elements 



sometimes amounts to three hours, 



Plassmann thinks this star as continuously variable, and he also 



noticed in 1891 a secondary dip in brightness fifty hours after the 



chief minimum. 



The decrease of liglit is more rapid than the increase. 



4. Schmidt found an inequality of nine years cycle in period, but this 



has been suspected by Chandler. The light-curve is symmetrical. 



5. Both branches deviate from symmetry, although it is very slight, the 



increase of light being a little faster. 



6. The return of light does not proceed uniformly, according to the 



observations of Sawyer and Chandler. It is arrested about half an 

 hour after minimum, by a '' standstill " of some fifteen minutes 

 as in the case of S Cancri. 

 The period is afftcted by an inequality, 



--''^{-ià>)+HlÊoï 



according to Chandler IV. 

 Two kinds of minima appear in a revolution. The principal is of 

 the magnitude 7'".G and lasts lO'' 40™ in the eclipse, while the 

 secondary minimum is of the magnitude G'^.O and lasts 7 hours. Both 

 curves are symmetrical. 



