RELATION OF ANIMAL BODIES TO HEAT, &C. 109 



ature ? ~* *What is said of animal heat ? What is the temperature of 

 cold blooded animals ? What preserves the heat of the body uniform ? 

 Is as much heat produced in the body in hot as in cold weather ? Do 

 animal bodies develope electricity. Can galvanic piles be made of ani- 

 mal substances alone fr -What kind of fish are electrical ? Describe the 

 electrical apparatus of the torpedo. What is a galvanic pile ? What 

 effects have the electrical discharges of the torpedo, &c. ? In what 

 respects like common electricity ? What is said of the phosphorescent 

 properties of animals ? What animals have this property ? What 

 does it depend on 1 



10 



