1904.] Bole of Blood Fluids in connection ivith Phagocytosis. 131 



Experiment 2. 

 A. 



S. R. D.'s unheated serum 3 vols. 



S. R. D.'s washed corpuscles 3 



Suspension of plague bacillus 1 vol. 



Phagocytic index (20 P.W.B.C.), 13 1. 

 B. 



S. R. D.'s heated serum 3 vols. 



S. R. D.'s washed corpuscles 3 ,, 



Suspension of plague bacillus 1 vol. 



Phagocytic index (20 P.W.B.C.), 2*1. 



Experiment 3. 

 A. 



A. E. W.'s unheated serum 3 vols. 



S. R. D.'s washed corpuscles 3 „ 



Suspension of plague bacillus 1 vol. 



Phagocytic index (21 P.W.B.C.), 19-6. 

 B. 



A. E. W.'s heated serum 3 vols. 



S. R. D.'s washed corpuscles 3 ,, 



Suspension of plague bacillus 1 vol 



Phagocytic index (54 P.W.B.C.), 8-4. 

 Experiment 4. 



A. 



B. H. S.'s unheated serum 2 vols. 



A. E. W.'s washed corpuscles 2 ,, 



Suspension of plague bacillus 1 vol. 



Phagocytic index (43 P.W.B.C.), 5-3. 

 B. 



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



A. E. W.'s washed corpuscles 2 



Suspension of plague bacillus I vol. 



Phagocytic index (43 P.W.B.C.), P4. 



It may incidentally be noted in connection with these experiments 

 that while the plague bacilli which lay free in the films were in each 

 case quite unaltered, many of those which had been ingested showed 



