1332 
TABLE ME 
Effect of Hydrogen on the phagocytosis 
Degree of Phagocytosis. 
The fluid is not It is treated with 
treated hydrogen - 
20.1 Oo | 25.7 % 
20.5 „ | 28, 
18:9- 253» 
Eee | 24.9 , 
This table shows that if the salt-solution is not treated with hydrogen, 
the phagocytosis averages 19.4°/,, if it is treated with hydrogen 
24.9°/,. - 
Besides these experiments several others were carried out, which 
all resulted invariably in phagocytosis being promoted by the action 
of hydrogen. 
Only a few series of experiments must be more particularly drawn 
attention to. Their purpose was to investigate to what extent an 
intense hydrogen-treatment would produce another degree of phago- 
cytosis than a less intense one. 
It appeared then that a less intense treatment raised the phago- 
eytosis from 41.2°/, to 47.1°/,, whilst an intense treatment only 
raised it to 45.4 °/,. 
It seemed to us that this must be due to the fact that an extensive 
removal of oxygen causes incipient paralysis, which will make itself 
the more felt as the oxygen is more completely removed. 
If this view was correct, then it must be possible to lower the 
phagocytosis still more by a still more energetic removal of oxygen, 
nay to make it fall below that observed in the fluids not treated 
with hydrogen. It was indeed found possible to do so. We shall 
give an account of a few experiments taken with nitrogen. 
Ill. Eject of an extensive removal of oxygen. 
A NaCl-solution of 0,9°/, is thoroughly treated with nitrogen ; 
this is also done with the bloodserum, which we did not do as yet; 
of this serum 2'/, vol. pere. is added to the NaCl-solution. Of this 
we take 4cem., add 0,3 eem. of a thick leucocyte-suspension (in 
NaCl 0,9°/,) and leave the mixture exposed to roomtemperature for 
half an hour. Thus the leucocytes lose oxygen. Now 0,3 ccm. of a 
