( 986 ) 
TAB IE IN: 
Concentration of the lodoform-solution in which the effect 
on phagocytosis is still perceptible. 
The leucocytes had been placed for about 18 hours 
in NaCl-sol. of 0.9°/. 
| Percentage of leucocytes, 
| which have taken up carbon. 
En 
Fluids. 
55 
Na CI 0,90/, | = < Oo =S 11,3 %p 
485 
21 
l lodoform to 100.000 Na Cl a X 100 = 44,2 , 
0.9"), (saturated Iodof.-sol.) 529 io 
[9 LKS 
1 Iodoform to —— * 100 = 4,3 
509.000 Na Cl 0.9°/, 709 / 
1 lodoform to bee DW SS 9 
100 0.000 Na Cl 0.9°/, 488 ohare | 
GT 
1 lodoform to zn < 100 = 46,8 
2000,000 Na Cl 0,99/, A80 ik 
1 Iodof. to 500.000 Na C10.9° , 156 ene. 
(saturated Iodof.-sol. 50 times LSR > 100 = 31,9 „ 
diluted) 
It is seen that in a NaCl-solution of 0,9 °/, the phagocytosis amounts 
to 11,3°/,; in the saturated lodoform-solution 44,2 °/,, and in the 
D0: told dilution still 31,9 °/-. 
So it appears that in this strong dilution lodoform is still able to 
awaken the phagocytes from their slight mobility. 
How much lodoform is found in this fluid > 
No data are extant, as far as we know, as to the solubility of 
lodoform in water or in NaCl-solution. Therefore we had to make 
some experiments ourselves. This was done by two methods. 
In the first place the clear well filtrated lodoform-solution was exposed to the 
light for a considerable time, Ull the lodoform smell was no longer observable, 
and was then treated with concentrated nitric acid. The fluid thus obtained was 
shaken with chloroform, which caused the iodine to pass into this fluid, and to 
colour it red. By the side of this Nal-solutions of known concentration were treated 
with HNO, and afterwards with Chloroform. 
Finally it was investigated what concentration of a Nal-solution gave the same 
colour intensity to the chloroform as the lodoform-solution under examination. 
From these experiments it appeared that in the saturated solution 
of Iodoform in NaCl 0.9°/, was found 0.001°/, Iodoform. 
_ The other method which consisted in the lodoform, split off under 
