36 PHILOSOPHICAL SOCIETY OF WASHINGTON. 
pology is correlated with the growth of the Bureau of Ethnology. 
The great modification in the relative attention given to different 
subjects is due to the large amount of new blood acquired by the 
Society. 
The statistics of the Mathematical Section are exhibited in the 
following table: 
TaBLeE IV. 
Statisties of the Mathematical Section from its Establishment to 1887. 
Wapiti ss aoe gs eS eye 1888. | 1884. | 1885. | 1886. | 1887. - 
Number ofpmectings == As 0 eek 9 6 6 2 12 
Number of communications ___-__. ._-.| ~18 11 14 3 20 
Average'attendince ls oO Loe se kee. 15 15 15 16 17 
Number-ofmemibers) 008 Jo ee 8b 3 41 40 44 
The whole number of papers presented to the Society, including 
those addressed to ordinary and special meetings and to the Mathe- 
matical Section, has been 786, and they have been communicated 
by 184 persons. Fifty-seven guests and correspondents of the So- 
ciety have furnished 67 papers, and 127 members have furnished 
719. The total number of persons who have at various times been 
elected to the Society is 312, and two-fifths of these have contributed 
something more than remarks to the proceedings. 
The following numerical data concerning the membership and 
common membership of the Philosophical and three other scientific 
societies were derived from what is known as the “Consolidated List 
of the Philosophical Society,” a list containing the names of the 
active members of the four societies and the resident members of 
the Cosmos Club. The list had been corrected to December 1, 1887. 
In Table V the Anthropological, Biological, Chemical, and Philo- 
sophical Societies are indicated by the initial letters of their names. 
