183 
PHYSICAL AND MATHEMATICAL SECTION. 
January 31st, 1882. 
Joseph Baxendell, President of the Section, in the Chair. 
Mr, W. H. Johnson, B.Sc., and Mr. William Thomson, 
F.B.8.E., F.C.S., were elected members of the Section. 
February 14th, 1882. 
Alfred Brothers, F.R.A.S., in the Chair. 
“ Notes on the Variable Stars U Canis Minoris, V Gemi- 
norum, and U Bootis,” by Joseph Baxendell, F.B.A.S. 
In a communication to the Section on April 13th, 1880, 
I announced the discovery of three new variable stars— the 
first in Canis minor, the second in Gemini, and the third in 
Bootes. The observations which I have since made, though 
much less numerous than I could have wished owing to 
ill health and unfavourable weather, have been sufficient to 
enable me to ascertain the nature and extent of the changes 
of brightness and to deduce approximate elements. 
U Canis Minoris. 
1855-0. a = 7h. 33m. 27-5s. 2= +8° 42*9'. 
A projection of the observations of this star shows that it 
has a double period, but unlike the other known double- 
period variables in which the sub-periods are nearly if not 
quite equal, in this they are very unequal. 
Proceedin 9-s—Lit . & Phil. Soc.— Yol. XXI.— No. 11.— Session 188L-2* 
