FUNCTIONAL INERTIA 



AWifiWi^^ 



FIG. 5. Record of contractions of frog's gastrocnemius produced by 

 suddenly establishing a strong constant current through i cm. of 

 the sciatic nerve average number, 3 to 4 per second : time in half- 

 seconds. 



order of periodicity as the above ; somewhere about 

 5 per second. (Fig. 7.) 



evidently the " function " of the respiratory 



FIG. 6. First line : record of tremor of frog's sartorius immersed in 

 Biedermann's fluid (sodic chloride, phosphate and carbonate) 

 average periodicity 3 to 4 per second. Second line : time in 

 half-seconds. 



