1330 
Here again the phagocytosis is increased everywhere by nitrogen. 
A new confirmation is supplied by the following series of expe- 
riments. 
FABLE IV. 
Effect of a treatment with nitrogen on phagocytosis. 
Degree of phagocytosis. 
The fluid is not | It is treated with 
treated | nitrogen 
| 
22.9 %p | 26.1 0/0 
23:8, | B 
a3 3. | 978 
20.5 , | 31.2 , 
Here again a higher degree of phagocytosis showed itself unmis- 
takablu, where only a slighter amount of oxygen was met with. 
It must be noted that in two instances the results were different. 
It appeared namely that in one of the experiments the result was 
as follows : 
in the NaCl-solution treated with air... . . . phagocytosis 34.7°/, 
LE iw = go OBYGER oss. 5 86. +3 
and in the other case: 
NaCl-solution treated with air... . . . phagocytosis 40.6°/, 
ms es 3. ORDEN et py ELT 
It is obvious, that am increased O-percentage has caused no decrease 
of the phagocytosis here, rather a slight increase. But these two 
results will have to be attributed either to mistakes in the experi- 
ment, or to individual differences, often met with in the phagocytes 
of different horses. The considerable amount of material which we 
have experimented with for many years, leaves no doubt about 
such differences. It has even occurred that the same horse which 
had been used 6 times at long intervals, and which had always 
supplied jieucocytes that gave satisfactory results, gave cells the 7‘ 
time with which hardly any phagocytosis could be obtained. 
This could not be attributed to the nature of the fluids, for with 
the same fluids another horse gave irreproachable results. 
Yet in the results obtained with nitrogen, the possibility remained 
that this gas contained substances which had accelerated the phago- 
eytosis. This was not very probable since the N, supplied by the 
