Harper, Reactions of Perich<sta. 



577 



TABLE I. 

 Percent of Fbequency of Different Reaction Types Under Different 



Stimuli. 



* Negative reactions to tap-water of room temperature were unrecognizable. 

 II 



HOJ- 1 



'2 32 16 



1 10 



Fig. 2. This shows the frequeucy polygons of the negative reaction types 

 under different degrees of stimulation. The different tyi^es are indicated by 

 Roman numerals. Since types II and V are intergraded, they are shown by a 

 single line. The figures indicate strength of acid (HCl). Same data as Table 1. 



