MECHANISM OF RENAL SECRETION 



69 



TABLE 4 

 K67 



Minutes 



= Iron 



- - = Volume in cc. 



Chart 4 Secretion curve for experiment K67. With the ferric ammonium 

 citrate injected was 1 grain of caffeine sodiobenzoate. Note the more rapid 

 rate of secretion. Scale is the same as in the other figures 



