T, Tadokoro : Mucimasp: in Yam. 



195 



Fig. 1. 



Minutes 

 From the foregoing table and figure, I perceived that i/ioooo normal concentra- 

 tion of calcium chloride has a distinctly accelerative power on mucinase, and this 

 power was increased perceptibly in r/rooo normal concentration. Also I could dis- 

 tinguished this power from the coaglating action of calcium chloride. 



2. Relation of enzymic to acidic coagulation. 



It has already been shown that a mucin solution coagulates in the presence of a 

 small amount of acetic acid. In my previous study (1. c), I coagulated the sample 

 of mucin from tubers of yam through the addition of acetic acid. Therefore, it 

 seemed to me of much interest to distinguish the coagulation by acetic acid from 

 that by enzymic action and to know the relation of both phenomena. The experi- 

 ments were undertaken in the same way as previously explained and gave the follow- 

 ing results : 



Table 2. 



