APPENDIX II 413 



hours ; the majority were dead in 22 hours ; and all were usually 

 dead in 28 hours. The difference between these avera'ges may be 

 said to be about 30 hours. I conclude that the plasma of one 

 person is poisonous to another person's leucocytes. 



Healthy person's leucocytes; plasma from cases of .typhoid feber. 

 All cells dead in 14 hours. Difference between test and control 

 about six hours, which is the average out of four cases. 



Healthy person's leucocytes; plasma from cases .of malaria\ 

 Majority of cells dead in 16 hours, a few alive in 18 ho'urs. 

 Occasionally 50 per cent were alive in 16 hours. Average differ- 

 ence between 12 cases and their controls about two hours. 



Healthy person's leucocytes; plasma from cases of phthisis. 

 Majority dead in 17 hours. Average difference between five 

 cases and their controls about one hour. Sometimes it was as 

 much as four hours, but in very chronic cases there Was little 

 difference. 



Healthy person's leucocytes; plasma from a case of osteo-myelitis. 

 50 per cent dead in 14 hours. Repeated with a case of gan- 

 genous appendicitis the films showed that the majority were 

 dead in 14 hours. The difference between these cases and their 

 controls were five hours and three and three-quarter hours 

 respectively. 



Healthy person's leucocytes; plasma from a case of purpura 

 hcemorrhagica. Majority dead in 15 hours; all dead in 20 hours. 

 Difference from controls five hours. 



Healthy person's leucocytes; plasma from a case of chorea. All 

 cells dead in 14 hours. Difference about six hours. 



Leucocytes from cases of typhoid fever; plasma from, other cases 

 of typhoid fever. Average from three groups of cases, all of which 

 reacted to Widal's reaction and were in the third or fourth week 

 of the disease except one which was convalescent. These groups 

 include the cases mentioned above. There was never a difference 

 of more than one and a half hours between the death of the 

 majority of cells in test and control tubes. 



Leucocytes from cases of malaria; plasma from other cases of 

 malaria. Five cases. The majority of cells in all cases were alive 

 in 18 hours. Practically no difference from controls. 



