m the Living St/stem. 99 



^ I , where it r^coveretf i little feeble motion of 

 its hind extremities, but was found dead after 

 thi'ee houfs. 



EXPERIMENT 49 



Amongst liic \w> lui^vulous expcinu^ius'of 

 Mr. John Hunter, many curious facts are met 

 with demonstrating, that animals whose ex- 

 citability is great, caA exist in a temperature 

 below the freezing point : as they tend to the 

 same point as the ab6ve we shall quote some 

 of them. 



'' The tem}Derature of a viper is 68 degrees. 

 ''^ It was placed ih tW temperiature of 10 

 '^ degrees : after ten minutes, its temperature 

 ** was reduced to 37 : after ten minutes more' 

 " it was 35 : after 30 minutes, it was at 31. 

 " nie temperature did not descend lower ; the 

 *' tail was beo:innina: to freeze !** 



'*^ 'File temperature in the stomach of a frog 

 " was 44 ; the animal was put into a degred 

 " of cold, when the terriperature in the sto 

 •* mach fell to 31 ; the animal appeated' 

 " almost dead, but recovered soon after being 

 " taken out. Beyond this point> the heart 

 *' could not be lessenexi' without destroying 

 ** the animal/' 



M 



