^i^-^JJvji^ S0ein: $'7 



EXPERIMENT 47. 



Four full grown frbgs^ were: placed in a tin 

 vessel at the temperature of 8.flegrces : >vJben 

 the animals were introduced, tke^ thermometer 

 rose to 19; the frogs, made rery violent strug^ 

 gles and appeared very.; linelasyL / After eight 

 minutes they were without motion :. thermos 

 meter at 7 degrees: after ten minutes the:$kin 

 of the belly of each w^s rigid, land after 1^ 

 mhiutes all the under part of the body andr^tiaef 

 extremities were frozen. -jn r s •' ' > /^. rf 



The skianposii Jthe back iof the .bodies.. wasf 

 jBeC^oftwjjjl^ej^ iw©re. reitiQYediaftejrr sixteen 

 minutes. 



One animal wns placca in the open air, in 

 a temperature of 3iv a ^second was placed, in 

 the window of a room where, the temperature 

 was more than 60; a third was placed at a 

 distance from the fire, where the temperature 

 was 80 ; the fourth was placed still nearer, in 

 a temperature betwixt 90 and 100. — After 

 about the space of three minutes, the two ani- 

 mals which were placed in the warmer tempe- 

 rature, became soft and exhibited a feeble 

 u cation ; they were then removed. The other 

 two were not yet able to move. After five 

 minutes a feeble motion was observable in the 



