AND ANIMAL LIFE. 391 



as those by which I have, throughout this work, 

 attempted to solve many difficulties connected 

 with organic and animal life. 



CCCCLXIV. In individuals of the sanguine- 

 ous temperament, we have those characteristics 

 which indicate an exuberance of vitality. The 

 strong contractions of the heart, the florid com- 

 plexion of the countenance, the development of 

 physical powers, the gaiety or cheerfulness of 

 the mind, or the occasional bursts of passion, are 

 a few of those symptoms by which this tempera- 

 ment is distinguished. The greater part of these 

 conditions are to be referred to the natural con- 

 stitution of the mind, and the peculiar circumstan- 

 ces under which it has been placed. The full 

 elucidation of this subject would present many 

 new views in regard to the temperaments ; but, 

 on the present occasion, it is sufficient to observe, 

 that if the character of the mind be cheerful, it 

 will invigorate the system, if melancholic it will 

 depress it. The mind has only one way of com- 

 municating its influence to the body, namely, 

 through the function of respiration ; and as this, or 

 a similar apparatus, is the primary source of the 

 continuance of existence in the whole animal 

 and vegetable creation, it necessarily follows, 

 that what excites or depresses its operation will 

 excite or depress the whole system. 



CCCCLXV. When any of the inferior ani- 

 mals have undergone excessive exercise, as, for 



