134 Dr. A. E. Wright and Capt. S. E. Douglas. [Jan. 11, 



B. 



S. B. D.'s heated serum 2 vols. 



S. B. D.'s washed corpuscles 2 



Suspension of Shiga's bacillus . . 1 vol. 



Phagocytic index (20 P.W.B.C.), 0-2. 



A certain number of the bacilli (and these bacilli were found 

 indifferently in the interior of the cells and free in the preparation) 

 had, in the case of the experiments undertaken with unheated serum, 

 undergone spherulation. 



Experiments on the Opsonic Power of Human Blood in its 

 Belation to the Bacillus coll 



Experiment 1. 

 A. 



B. H. S.'s unheated serum 3 vols. 



B. H. S.'s washed corpuscles 3 



Suspension of the Bacillus coli 1 vol. 



Phagocytic index (20 P.W.B.C.), 3'8. 

 B. 



B. H. S.'s heated serum 3 vols. 



B. H. S.'s washed corpuscles 3 ,, 



Suspension of the Bacillus coli 1 vol. 



Phagocytic index (20 P.W.B.C.), 0-75. 



Experiment 2. 

 A. 



F. F.'s unheated serum 3 vols. 



F. F.'s washed corpuscles . - 3 „ 



Suspension of the Bacillus coli 1 vol. 



Phagocytic index (20 P.W.B.C.), 5. 

 B. 



F. F.'s heated serum 3 vols. 



F. F.'s washed corpuscles 3 ,, 



Suspension of the Bacillus coli 1 vol. 



Phagocytic index (21 P.W.B.C.), 0'76. 



