116 THE LAWS OF ORGANIC 



greater proportional quantity will be distributed upon 

 the surface of the body at this period of life, and con- 

 sequently a greater quantity will be exposed to the 

 action of heat or cold. 



$. That exercise, and stimuli of every description will pro- 

 duce a factitious condition of the system, in character 

 somewhat similar to that which is natural to the child. 



3. That the general application of heat and cold will be 

 injurious or beneficial according to the distribution 

 of the blood upon the surface of the body and the 

 degree of energy possessed by the internal organs. 



CXV1II. Having premised these general prin- 

 ciples, we shall be enabled to understand the influ- 

 ence of seasons in modifying the distribution of 

 the blood. 



The temperature of summer enlivens the ani- 

 mal and vegetable world, because the organic 

 life of both is regulated by the same physical 

 laws, and heat is as much a stimulus to the gener- 

 ation of motion in the one as in the other, and 

 from motion and warmth spring every change that 

 is necessary to preserve existence or maintain its 

 attributes. 



CXIX. The hibernating animals, and such as 

 retain during the severity of winter the general 

 powers of life, are enabled, by the greater warmth 

 of spring, to resume their different functions. 

 The former are again animated, and the latter, 

 in addition to their present faculties, display, 

 like the plant, an exuberance of life. 



