268 



G. T. C A LOWELL. 



body weight without loss of vitality. The salamanders proved 

 easy to handle, oriented themselves negatively to light in the 

 darker region of the animal chamber and remained quiet. When 

 placed in the desiccator for the first time, the animals were quite 

 active for 5 minutes, never longer. Carbon dioxide determina- 

 tions prior to losses of 20 to 25 per cent, in body weight showed a 

 rapid increase while continued desiccation resulted in a decrease 

 in carbon dioxide output. The control animals lost very little 

 water, not enough to appreciably affect the rate of carbon 

 dioxide production. 



Frog, Acris gryllus Le Conte. Adult frogs of this species which 



/& 



I / 



FIG. 6. The effect of desiccation on the carbon dioxide production of the frog. 

 Points (x) on control curves (indicated by letter A) correspond to determinations on 

 experimental curves. Control curves twice experimental scale. 



