Cil2 



For lliis purpose we used capillary tubes whh extract ofbacteria- 

 coli in XaCl 0,9 "/o' i" ^'^'liicli 1 : 100.000 tui-pentiuc had been dissolved. 



Ill each rabbit 4 capillary tubes witli and 4 without turpentine 

 were placed on one side under the skin of the leg. After 20 hours 

 they were taken away, and the lengths of the leucocyte-columns 

 were measured. 



Table II gives the results of this experiment. 



TABLE II. 

 Effect of extract of Coli-bacteria on chemotaxis. 



Left lee i ^'^ht leg. 



Coli-bacteria^xtract' Coli-bacteria extract 



in 0.900 NaCl l+i/i^oc^^oo^^tu'ïp^ntinel 



Rabbit 5 



„■ 6 



1 



8 



9 



„ 10 



.. 11 



Total of 4 leucocyte- 1 

 columns after 



20 hours 



4,8 mm 



3.2 , 



4.- „ 



4.8 „ 



4.1 „ 



6.9 „ 



2.2 „ 



4.6 mm 



4.8 „ 



5.1 „ 

 6.4 „ 



5.2 „ 

 7.1 „ 

 3.1 .. 



— 0.2 



-}■ 1.6 



+ 1-1 



-f- 1.6 



+ 1-1 

 + 0.2 

 + 0.9 



In 6 of the 7 cases, therefore, the turpentine in a concentration 

 of 1 : 100.000 has stimulated the chemotaxis. 



In order to investigate if rabbit 5 made .an exception to the rule, 

 or if a mistake had been made in the experiment, the experiment 

 was repeated with the same rabbit in the same places. It was found 

 then that the values became 5,1 and 6.8 respectively. In this case 

 too an increased chemotaxis has, therefore, been established. 



We subjoin an experiment with a weaker turpentine-solution viz. 

 with turpentine 1 : 500.000. Cf. table III. 



T/iede results show that an addition of turpentine 1 .-500.000 lias 

 had a much more favourable e feet still on the chemotaxis than 

 turpentine 1 : 100.000. 



Elsewhere ') a more detailed account of the experiments will be 

 published. 



1) hi the dissertation (Bern) of Mr- J. Buitenhuis. 



