ANIMAL GRAFTS AND REGENERATIONS. 
SCIENTIFIC examinations followed out by the method 
“of experiment are usually of a kind which either aids in 
completing theoretical conceptions as to the world, or else 
serves to stimulate useful applications in the region of in- 
dustry and the arts. They sometimes join both these ad- 
_ vantageous objects. The subject—an entirely new one— 
of animal grafting and regeneration. presents this twofold 
interest in a very high degree. It sheds light on physio- 
logical theories, and supplies medical practice with novel 
resources ; but it possesses. another character of marked 
eiieatattty in this respect, that the positive results it yields 
contribute at once to confirm the boldest. conjectures of 
philosophic genius in past times, and to authorize the most 
daring hopes indulged by naturalists who have faith in 
man’s omnipotence in times to come. It is our design to 
give a succinct demonstration of this truth. 
1. 
At the opening of the eighteenth century, hardly any 
other instance was known of the case of reproduction of 
organs in animals except that of the lizard’s tail, which 
grows again after having been cut off. At least, savants 
knew no others, or rather they denied and classed with 
fables the declarations of fishermen regarding the regenera- 
tion of the limbs of crawfish, lobsters, etc. Réaumur de- 
termined, in 1712, to get at the truth as to these stories, 
