( m ) 



influence of concentration. Willi this object in view, common salt 



was dissolved in the serum in quantities of 0.1, 0.2, 0.3, 0.4 °/ and 



more. The results of these experiments are shown in the following 

 table : 



TABLE III. 

 Effects on phagocytosis by increased concentration of the serum. 



Here we see tJiat the injurious effect is very great, much greater 

 than is the case when the osmotic concentration has been diminished. 

 Then we observed that by diluting the serum with 20 % water, 

 phagocytarian capacity fell 13.5 °/ ; here we find that by raising the 

 osmotic concentration by 10 %. tne phagocytarian power is lowered 

 by 17.3%. This effect must already be perceptible within the phy- 

 siological boundaries in which the osmotic pressure of the blood 

 plasma usually varies in the normal body. For it may happen 

 every day that in a normal individual the osmotic pressure of the 

 liquor sanguinis, a few hours after dinner, is still raised by that of 

 0.1 % common salt '). 



Here again, as we did before when studying the decrease of 

 osmotic pressure, we ask whether the loss of phagocytarian power 



') Kof.ppe, 1. c. 



D. Schoute. Het physisch-chemisch onderzoek van menschelijk bloed in de 

 kliniek. Diss. Groningen 1903. 



See also Osmot. Druck u. Ionenlehre B. I S. 540 ff.; B. II S. 279 and 310 ff. 



