VELOCITY OF REACTION. HETEROGENEOUS SYSTEMS 125 



If we calculate the constants for the five series, we 

 find: 



1.8 10.7 21 27 and 41 or 



1.1,8 4.2,7 9.2,3 16.1,7 and 25.1,64 



or in mean the constant is 2 t. With this constant the 

 calculated figures are obtained. The observed values 

 agree in general as well as might be expected with the 

 calculated ones, and probably the deviation is not greater 

 than might be referred to the experimental errors. (Per- 

 haps real or so-called false equilibria disturb the observa- 

 tions for high values of /.) 



The seeds of Ricinns communis (castor bean) contain an 

 enzyme which decomposes the oil from these seeds into 

 fatty acid and glycerine. This process seems also to 

 follow the same laws as the decomposition of fats by 

 gastric juice. I reproduce some figures from the article 

 of Connstein, Hoyer, and Wartenberg. 1 They prepared 

 an emulsion by grinding 5 g. of Ricinus seeds and 6.5 g. 

 of castor oil, and thereafter adding 4 g. of an acid. The 



1 Connstein, Hoyer, and Wartenberg: BerichU d. d. chtm. Gcs., 35. 3988 

 (1903). 



