Anti-Ostrich Serum 



203 



(No. 428), the bird having died at the Zoological Society's Gardens, 

 London. The antiserum was very powerful, giving, when standardized, 

 a precipitum of '042 c.c. 



Reactions 



* All 3 Struthionidae. 



The general results correspond to those given in the preceding 

 table, nevertheless, we see that the bloods of Ratitae (three Struthio- 

 nidae) give a higher percentage of large reactions than do those of 



