Besides, in one of the experiments I have mentioned, the sensibility 

 had been increased in consequence of the section of the p6sterior 

 columns of the spirial cord. I will therefore relate an experiment 

 in which there was no cause of increase of the vital properties of the 

 sensitive nerves. 



Exp. 3. On a vigorous adult male Guinea-pig I tied the common 

 iliac artery, on the two sides, at 15 minutes past three, P.M. 



At 3 '25 very weak voluntary movements remained in the posterior 

 limbs ; their sensibility almost normal. 



From 3*25 to 3*35 slight convulsions in the posterior limbs. 



At 4 o'clock muscular irritability was much diminished in the 

 posterior limbs ; sensibility not so much diminished. 



At 4*30 cadaveric rigidity had begun everywhere, in the posterior 

 limbs ; sensibility, though greatly diminished, still existed. 



At 5-20 cadaveric rigidity very strong ; traces of sensibility still 

 very evident. 



At 5*50 the last traces of sensibility disappeared. 



This experiment shows that the vital property of sensitive nerves, 

 deprived of blood, lasts longer than that of muscles in the same 

 circumstances. 



In the experiments made by other physiologists on this subject, 

 they had put a ligature around the aorta, sufficiently high to diminish 

 circulation in the lumbar region of the spinal cord, and the loss of 

 sensibility which then soon took place in the posterior limbs de- 

 pended upon the diminution of function of the spinal cord, and, as 

 my experiments show, not on the loss of the vital property of the 

 sensitive nerves of the posterior limbs. 



To find out the difference of duration of the vital property of 

 motor nerves and of that of muscles, I have made many experiments 

 of the following kind : 



Exp. 4. I laid bare the sciatic nerve in the whole length of the 

 thigh of a strong adult Rabbit, and dissected its neurilemma, so as 

 to cut away all the small blood-vessels running on this nerve. I then 

 did the same thing with the crural nerve. Three hours afterwards, 

 a slight diminution of voluntary movement and of sensibility was 

 observed ; two hours later, sensibility and voluntary movement were 

 still persisting, though notably diminished. 



Five hours still later, sensibility had increased, while voluntary 



