THE SIGNS OF LIFE 



[LECT. 



inspection viz., the great delay between excitation and response 

 about two seconds with a fresh preparation, about three 



Voit.. 



005- 



OO4- 

 OO3- 



ooa- 



001 - 



o 



10 



30 sees. 



. 

 002 



OOI - 



[ I 1 t I 



o 



10 



20 



jo sees. 



FlG. 28. Frog. Nerve-skin preparation. Galvanometric records of the lost 

 time of the response to indirect excitation by tetanisation of the sciatic nerve. Lost 

 time 2 to 3 sees. Lost time of the galvanometer itself = I sec. 



relation to that given in the text will be easily traced if it be remembered 

 that there all outgoing effects read upwards and all ingoing effects down- 

 wards. 



Outgoing- 



* 



I "Exceptional; 1 



Hermann.. 



Ingoing 



FIG. 29. 



