384 PHILOSOPHICAL SOCIETY OE WASHINGTON. 
this attendance expressed as a percentage of the number of active 
membership, and finally the dates of organization of the various 
associated scientific societies in Washington are indicated. 
Date. 
Active 
mem¬ 
bers. 
Gain + 
Loss — 
New 
mem¬ 
bers. 
Attend¬ 
ance 
average. 
Per 
cent. 
Societies organized. 
1879 
Anthropological. 
1880 
Biological. 
1881 
May, 1882 
* 149* 
1883 
149 
1884 
173 
+ 24 
35 
42 
24 
Chemical and Ento¬ 
mological. 
1885 
179 
+ 6 
22 
45 
27 
1886 
183 
+ 4 
18 
47 
26 
1887 
189 
+ 6 
14 
49 
26 
1888 
185 
— 4 
11 
40 
22 
Geographic. 
1889 
189 
+ 4 
10 
40 
21 
1890 
198 
+ 9 
18 
42 
21 
1891 
197 
— 1 
10 
36 
16 
1892 
188 
— 9 
4 
33 
18 
1893 
177 
— 11 
6 
33 
19 
Geological. 
1894 
155 
— 22 
4 
35 
23 
Historical. 
1895 
142 
— 13 
4 
29 
20 
1896 
123 
— 19 
9 
28 
23 
1897 
121 
— 2 
8 
29 
24 
1898 
118 
— 3 
4 
22 
19 
Academy. 
1899 
114 
— 4 
5 
31 
27 
1900 
112 
— 2 
6 
26 
23 
1901 
108 
— 4 
8 
29 
27 
The table indicates that the maximum membership of the 
Society was 198 in 1890, two years after the organization of the 
Geographic Society, and that the most rapid rate of decrease of 
membership was in 1894, the year of organization of the His¬ 
torical Society and one year after the organization of the Geo¬ 
logical Society, during which year the membership decreased by 
22, and that since 1897 the average rate of decrease has been 3. 
The number of new members elected steadily decreased from 
1884, when 35 members were elected, to 1891, when 10 new mem¬ 
bers were elected. From 1892 to the present the rate of election 
of new members has been nearly constant at an average rate of 6, 
although during this interval the Geological and Historical So¬ 
cieties and the Academy of Sciences have been organized. The 
maximum average attendance between 1884 and the present was 
