472 



MINNA E. JEWELL 



hours was suggestive of poisoning. Acetic acid (CH3COOH) 

 was also excluded from subsequent experiments pending further 

 work upon the possible toxic effect of the organic radical. 



TABLE 1 

 Regenera'ion in KOH. Length of tadpoles 53 to 59 mm. 



Total length and readings for ninth, thirteenth, and eighteenth days omitted. 



Regeneration in bases 



Tables 1 and 2 give the regeneration of individual tadpoles, 

 large and small, respectively, in KOH. Figures 1 and 2 are 

 curves of growth drawn from the same data. These experiments 



