( 317 ) 



We see from this table that in a dilution of 1 to 100000 butyric acid 

 has a pernicious effect on phagocytosis; in a dihition, iiowever, of 

 1 to 500000 the phagocytarian capacitj' rises from 38.1 to 46.9, to 

 return again to its normal value at a dilution of 1 to 1000000. 



Similar results have been acqnired with propionic acid, as is seen 

 fiom the following table. 



Eject of Propionic acid on Phayoci/tosi.s. 

 TABLE IV. 



Fluids. 



Percentage of leucocytes having 

 taken up carbon. 



500000 



102 



3^X 100 = 27. 2'/o 



As we see from the preceding table the phagocytosis in NaCl 0.97o 

 amounts to 4().5 7o- Already, an addition of propionic acid of 1 to 

 100000 prevents it almost entirely, and a dilution of 1 to 500000 

 still causes a considerable decrease. Therefore experiments were also 

 made with slighter amounts of propionic acid. The following table 

 contains the results of these experiments. 



Ej^ect of Propionic acid on Phagocytosis. 

 TABLE V. 



Fluids. 



Percentage of leucocytes having 

 taken up carbon. 



NaCl 0.9X 



1 propionic acid to 500 . 000 NaCl sol. 



» 1000.000 » 



» 5000.000 » > 



» 10.000.000 » 



^^^X 100 = 38.1% 



314 

 992 



425 

 902 



X100 = 31.67o 



X 100 = 47.10/0 



45fi 



1^X100 = 52.80/0 



9^X100 = 41.6% 



22* 



