NINTH ANNUAL REPORT. om 
of Burrowing Rodents, also disappeared temporarily, because of 
the necessity to renew all the wire-work of the cages, put in con- 
crete floors, and rebuild the rockwork. Next year, however, the 
complete restocking of these installations will show a marked in- 
crease in our total number of species and specimens on exhibition. 
The collections now comprise 1,802 specimens with 436 species. 
MEDICAL DEPARTMENT. 
During the year 1904 the Medical Department, under the direc- 
tion of Dr. Harlow Brooks and Dr. W. Reid Blair, has continued 
to maintain the high medical standard at the Park, and their dis- 
coveries during the year of the causes of cage paralysis, a much 
dreaded disease among animals in captivity, are set forth in their 
report in this volume, together with illustrations of great interest. 
As heretofore stated, data of this character are being accumulated, 
and will be published under the direction of the Society, and will 
ultimately form a valuable addition to medical science. 
The increased knowledge and experience in the prevention and 
treatment of diseases and the careful system of quarantine for 
new animals now provided by the Park has resulted in a con- 
stantly declining death rate. The improvements in the installa- 
tion for our animals, and the replacement of temporary quarters 
by permanent installations has also resulted in the generally 
healthy condition of the collections. 
MEMBERSHIP. 
The membership of the Society on January I, 1905, was as 
follows: 
OUmMGeTS eS fa tacs-2'. Ss Cratos Sens wan ea oes 2 
Nssociate Moundersia\ cis 7: @-A- a2 oe eee II 
PAthOMSm rere estes ces a ard cecness ) ke eee 45 
Wine Vem eESiaa bast ot cero wet eee 179 
Tina VICMDERS: .surrsd ge soe oe 1,314 
GO alll eects ers See Aisha amt Semen et sueyae Sy 
Motallasty vedanta gh. aeoenioe os cece s eee 
MCT EASE ite Nysier net herd ceo oe rte 241 
Showing a substantial increase over last year in spite of a large 
number of deaths. Efforts were made to increase the member- 
