[ 2 4 ] 
Experiment XIII. 
A prepared frog was fatigued by exci¬ 
tation, from ten at night till one in the 
morning; at a quarter paft nine of the 
fame morning, I found it Ihewed figns of 
life. 
Experiment XIV. 
A fecond frog was expofed to the action 
of an inconliderable portion of artificial 
electricity for an hour. Twenty hours 
afterwards, it appeared that the vital 
principle was not entirely extinguilhed. 
Experiment XV. 
A third, w’hich had been excited for 
half an hour, lived a whole day after. 
In the laft, when I feparated the mufcles, 
at the expiration of two hours, in order 
to lay bare and coat the nerve, the leg 
■ 
contracted with an extraordinary degree of 
force. 
