308 



molecule or an H-ion before it has lost its power by spreading. In 

 the very dilute solutions of 0,01 7o 'i^'^a and of low H-ion concen- 

 tration this effect may certainly be expected, especially if a great 

 deal of the urea has been hydrolysed. 



As will be explained further on, a decrease of m in these alkaline 

 solutions may also be brought about in the course of time by the 

 reversed action, the synthesis of urea. 



TABLE 12. 



Concentration 

 of urease. 



Pji 



m, for unit of urease 

 concentration. 



0.000205 



0.000221 



0.000267 



0.00027 



0.000263 



0.000347 



0.00036 



0.000525 



0.00050 



0.00067 



0.00067 



0.000752 



0.000689 



0.000717 



0.00060 



0.000646 



0.000467 



0.000479 



0.000405 



0.000431 



0.000245 



0.000453 



0.000388 



0.000416 



0.000423 



