86 On ike Effiects of Opium 



EXPERIMENT (c.) 



An experiment directly apposite to tliat just 

 related, we talce'^'the liberty td-quote. 



" A full grown rabbit, the Bairs of the skin 

 occasionally wetted, died after two hours and 

 forty-one minutes, when exposed to a degree 

 of cold which varied from 15 to 10°.'* ~ 



" The blood let out from the heart of 

 another adult animal killed by cold, raised the 

 thermometer to 58^" 



" A young rabbit compared with the first 

 and w^et in like manner, sustained life more 

 than five hours, in a degree 't>f cold, which 

 varied from 15 to 2^"." 



" The blood of another young rabbit killed 

 by cold, when the heart was punctured, raised 

 the theraiometer,'only to 48^** 



From these last related experiments it ap- 

 pears probable, that the action of the heart of 

 a young animal >\'hose excitability is more 

 abundant than that of an adult animal, can go 

 on for some time in a temperature which will 

 even destroy the life of an adult animal. 



We next proceeded to examine the efiPects 

 of cold upon animals whose excitability is 

 more abundant, than in young rabbits. 



