GENERAL MEETINGS. 
37 
Table V. 
Common Membership of Four Societies. 
Members of 
Members of 
Members of 
Members of all four___ 3 
one only. 
two only. 
three only. 
“ three only_ 34 
A._ 79 
A.,B.-_ 12 
A.,B.,C. 0 
“ three or more 37 
“ two only _ 78 
B_ 101 
C. _ 22 
A.,C.- 1 
A.,P.__ 28 
A.,B.,P. 28 
A.,C.,P. 3 
“ two or more__ 115 
P. 91 
B.. C.-_ 2 
B.,C.,P. 3 
“ one only.__ 293 
293 
B. , P.__ 25 
C. , P;_- 10 
78 
34 
Total number of persons._ 408 
Total memberships. 
Overlap, by pairs. 
A_ 154 
B_ 174 
O_ 44 
P__ 191 
Sum_ 563 
Net total_ 408 
Difference (due to overlap). 155 
A , B._ 43 
A., C_ _ 7 
A. , P- 62 
B , C_ 8 
B. , P._ 59 
C. , P._ 19 
Fifty-two per cent, of the members of the Philosophical Society ' 
are likewise in one or more of the other societies. The correspond¬ 
ing percentages for the other societies are : Chemical, 50; Anthro¬ 
pological, 49; Biological, 42. 
The Cosmos Club has a resident membership of 227, of whom 
128, or 56 per cent., belong to one or more of the four societies. 
