ANIMAL CASTRATION. 



33 



of Chassaignac has received many modifications, all 

 of which, however, operate upon the same principle 

 FIG. 7. 



VARIOUS KINDS OF ECRASEURS. 



The essential design of all is to produce a general 

 constriction of the blood vessels, by which their in- 

 ternal and middle coats being first divided, may con- 

 tract within the cavity of the vessel in such a manner 



