218 



VERTEBRATA 



parts of the system and paralyzing the nerves controlling 

 the heart and lungs. Wliiskey is useful to stimulate the 

 latter organs and a large quantity of milk should be drunk 



FIG. 251. A, venomous snake (Copperhead) ; B, harmless snake. Photograph 

 natural size. 



until vomiting occurs several times. In the mean time a 

 physician should be sent for to administer hypodermically 



FIG. 252. Copperhead with mouth open and fangs erected as when biting. Photo- 

 graph natural size. 



the proper antidotes, which are potassium permanganate 

 or chromic acid in the proportion of one part of the chem- 

 ical to one hundred parts of water. 

 The copperhead or pilot (Ancistrodon contortrix) is a 



