444 Dr. Philip’s additional experiments on the 
to be quite dead, but the circulation in the web was found 
to be vigorous. 
From the foregoing experiments and observations, it ap- 
pears, 
1. That the laws which regulate the effects of stimuli, 
applied to the nervous system, on the muscles of voluntary 
and involuntary motion, are different. Exp. 2, 3, 4, 5, 6, 7. 
2. That both mechanical and chemical stimuli, applied to 
any considerable portion of the nervous system, increase the 
action of the heart. Exp. 2, 3. 
3. That neither mechanical nor chemical stimuli applied to 
the nervous system, excite the muscles of voluntary motion, 
unless they are applied near to the origin of the nerves and 
spinal marrow. Exp. 2, 3, 4. 
4. That mechanical stimuli applied to the nervous system, 
are better fitted to excite the muscles of voluntary motion, and 
chemical stimuli, those of involuntary motion. Exp. 2, 3, 4. 
5. That after all stimuli, applied to the nervous system, 
fail to excite the muscles of voluntary motion, both mechani- 
cal and chemical stimuli, so applied, still excite the heart. 
Exp. 5. 
6. That both mechanical and chemical stimuli applied to 
the nervous system, excite irregular action in the muscles of 
voluntary motion. Exp. 2, 3, &c. 
7. That neither excite irregular action in the heart, nor is 
its action rendered irregular by sedatives, unless a blow which 
crushes the brain be regarded as a sedative. Exp. 6. 
8. That the excitement of the muscles of voluntary motion 
takes place chiefly at the moment at which the stimulus is 
