1907. | Observations upon Phagocytosis. 173 
In the following observation, the action of normal washed cells is compared 
with the action of the same standard pneumonia cells as used in the pre- 
ceding observations, in normal heated serum. 
1 vol. of normal washed cells, 
1 ,, normal heated serum, 
1,4, melanin. 
1 vol. of standard pneumonia washed cells, ‘ 
1,4, normal heated serum, 
I +, ‘melansa, 
Andie sss pans. te 2 
In the five preceding observations, in the first four of which washed normal 
cells were tested against washed immune cells in heated immune serum, and 
in the fifth in normal heated serum, the indices run :— 
(o° 1 16 2 2. 
In two the immune cells are doing more work than normal cells in the 
heated immune serum, and the same is true in the case of the heated normal 
serum. ; 
In the following observations, colon bacilli were substituted for melanin, 
and the cells from a case of streptococcal puerperal fever, with multiple 
intramuscular and subcutaneous abscesses, were used in coli serum against 
normal cells in the same coli serum. 
The patient from whom the cells were taken died within 48 hours after 
the blood was taken. The blood was observed to be very watery when taken, 
and showed agglutination of the red cells. 
Case.— Urinary fever ; B. cold infection. - 
1 vol. of normal washed cells, 
Ls - serum, 
1 ,;,° -colon bacilli: 
1 vol. of normal washed cells, 
‘14, + patient’s serum (B. colz infection), 
1 ,, colon bacilli. 
TndeX...0s sss OA 
This index shows that the patient’s serum is markedly active, i.c., it contains 
2 good amount of an-opsonin which will prepare the colon bacillus for 
ingestion. | 
