402 



W. W. SWINGLE 



TABLE 1 



April 11 



much in advance of the controls (table 4). No mortality had 

 occurred in the cultures of either group. 



May 18th. The experimental animals were much larger than 

 the controls, more sluggish, lighter in color, limbs much more 

 highly developed and much larger. No other differences were 

 noted (table 5). 



The animals of this culture were not measured again, owing 

 to the pressure of other work at this time. They were fed and 

 tended as usual, however. It was observed sometime later 

 that the potassium-iodide-fed animals appeared to be slowly 

 falling behind in growth rate. They remained much lighter in 

 color and had hmbs much longer than the controls. The cul- 

 tures were kept until the 1st of June. When it became impos- 



