( 987 
the influence of HNO,, being titrated with the aid of Na,S,O, and 
KMnO,; gave almost identical results: a concentration of 0.00109°/,. 
So that we may say that even in a concentration of 1 to 5.000.000 
or, m other words, in a solution. of 1 gr. molecule CHI, to 1.905.000 
litres water, lodoform accelerates phagocytosis to a considerable extent. 
The experiments in table IV leave no doubt but that the dilution 
may be carried on still further. 
How does lodoform effect an acceleration of phagocytosis * 
In the first place we proposed to ourselves the question whether 
it might be perhaps traces of iodine which, though present only 
ions, had this stimulating effect. Against this view pleaded already 
former experiments on the comparative effect of NaCl, NaBr, and 
Nal, which has shown that the ion of iodine weakens phagocytosis 
to a considerable extent. *) 
Another objection to this view was furnished by the experiments 
with an iodoform solution whieh had been exposed to the light for 
mA: E En Ve 
lodoform solution the composition of which has been 
modified by the influence of diffuse daylight 
Time during Percentage of saar having taken up 
which the ES ed pe AR 
phagocytes pee eR 
wereallowed| The leucocytes are | ME pape ak a 
to take op , : iodoform 
carbon. in NaCl 0.9% solution. 
i0 minutes | 1! 
he 
= 96,79, | ars 100 = 15,40, 
| He 
20 128 100 Ns 
“a | —— VU Zy 
7 » | 59% 
5 189 28 
30 » |oo 100=406, | 100 = 34,7» 
465 : 512 
; 287 i 163 
| hour = X100= 61,7, | zp X 100 = 364 y 
| 447 
1 329 | 425 ety 
1 „ x< 100 = 56, Dn an 100: 508» 
314 
578 
1) Hampurcer und De Haan. Biochem. Zeitschr, 24, 304, 1910. 
