140 



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



Experiment 3. 



A. 



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



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



Suspension of the diphtheria bacillus 1 vol. 



Phagocytic index (44 P.W.B.C.), 4-0. 

 B. 



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



B. H. S.'s washed corpuscles 3 „ 



Suspension of the diphtheria bacillus 1 vol. 



Phagocytic index (50 P.W.B.C.), 3-3. 



Experiment 4. 

 A. 



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



A. E. W.'s washed corpuscles 3 ,, 



Suspension of the xerosis bacillus 1 vol. 



Phagocytic index (40 P.W.B.C.), 2-8. 

 B. 



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



A. E. W.'s washed corpuscles 3 „ 



Suspension of the xerosis bacillus 1 vol. 



Phagocytic index (25 P.W.B.C.), 3-2. 



Experiment 5. 

 A. 



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



B. H. S.'s washed corpuscles 3 „ 



Suspension of the xerosis bacillus 1 vol. 



Phagocytic index (30 P.W.B.C.), 6 3. 

 B. 



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



B. H. S.'s washed corpuscles 3 



Suspension of the xerosis bacillus 1 vol. 



Phagocytic index (30 P.W.B.C.), 6. 



Conclusions. 



The experimental data which have been set forth above establish that 

 the opsonic action of the blood fluids — to which attention was for the 

 first time directed in our previous communication — is exerted not 

 exclusively upon the Staphylococcus pyogenes, but also upon the Bacillus 



