OF THE HUMAN BODY. 91 



as an analogous case, that trout often devour fer- 

 tilized trouts' eggs at the spawning time, but that 

 these eggs, when again taken out of the stomachs 

 of the trout, and put uninjured into fresh water, do 

 not become developed.) 



3. It is, however, possible that amphibia may 

 get into the human subject by intentional or acci- 

 dental swallowing. 



4. Such animals may be again evacuated either 

 in a living or asphyxied state, when vomiting takes 

 place soon after they are swallowed. 



5. If this vomiting only takes place at a later 

 period, the animals thrown up are dead; if no 

 vomiting takes place, the animals are more or less 

 digested, and we find either their epidermis or 

 bones, or nothing at all of them, in the faeces. 



6. The only and true reason why the amphibia 

 cannot permanently live in the human body, is the 

 moist heat of at least eighty degrees Fah., which 

 no species of amphibia (frogs of all kinds, frogs' 

 spawn, the tadpoles of frogs and toads, salaman- 

 ders, tritons and their spawn, lizards, and slow- 

 worms, were employed in the experiments) can 

 resist from two to four hours. 



The method of experiment was as follows : 



