EXPERIMENTS ON RABBITS. 15 



SERIES IV. Rabbits to which 50 mg caffein per kilo were administered subzutaneou*! < 



1 Total recovery for oat fed rabbits 1.72 per cent, for carrot fed 7.18 per cent. 



2 In 2 hours. 



Series V. 



SERIES V. Rabbits receiving 50 mg per kilo of caffein. 



1 Small amount of feces excreted by these rabbits, probably not over 50 grams during the entire experi- 

 ment; there was no diarrhea whatever. 



The enormous difference in the amounts of caffein eliminated on 

 the diets employed in the last series made the repetition of these 

 experiments necessary. Although considerably more caffein was 

 excreted on an oat diet than in Series IV much less was recovered 

 than in the parallel experiments when feeding carrots. It will be 

 noticed also that the appetite was not impaired and that much larger 

 amounts of urine were passed when carrots were eaten. 



