170 TRANSACTIONS OF THE [APR. 2, 
In the absence of Mr. Jacoby, the paper on 61 Cygni was read 
by Professor Rees. This paper has been published recently in 
full in the Monthly Notices (No. 2, Vol. LIV., Dec., 1893) of the 
Royal Astronomical Society of London. Professor Rees called 
attention to the importance of all observations showing changes 
in the relative positions of the components of 61 Cygni. He 
remarked on the present uncertainty as to whether the pair 
formed a true binary system or not. Calculations had given 
such differing orbits as are indicated by periods of 1159 and 462 
years. The observations of 8. W. Burnham lead him to con- 
clude that the members of the pair are separating,and Professor 
Hall, from his observations extending over a period of 12 years, 
favors the view of physical connection of these stars (Astr. 
Journal, No. 258, page 140). 
Prof. Hallock read a paper on a method of defining standard 
colors, and showed many samples of colors and the five dises of 
standard color used. The methods of defining standard color 
with them were illustrated. - 
Prof. Rees remarked upon the importance of the work. 
Dr. T. J.J. See, of the University of Chicago, read a paper on 
the “Origin of the Heavenly Bodies,” illustrated with lantern 
slides. He believes that the double stars originated by the 
swinging apart of one nebula through a process of splitting. 
The paper was discussed by President Rees and others. 
The Academy then adjourned. 
Wo. HALtock, 
Secretary pro tem. 
J. F. Kemp, 
Recording Secretary. 
REGULAR BustNness MEETING. 
April 2d, 1894. 
The meeting was called to order with President Rees in the 
chair. Fifteen persons present. 
