6 INTRODUCTION. 



work. This illustrious anatomist maintains that man 

 is endowed with certain muscles solely for the sake 

 of expressing his emotions. As this view is obviously 

 opposed to the belief that man is descended from some 

 other and lower form, it was necessary for me to con- 

 sider it. I likewise wished to ascertain how far the 

 emotions are expressed in the same manner by the dif- 

 ferent races of man. But, owing to the length of the 

 present work, I have thought it better to reserve my 

 essay, which is partially completed, for separate pub- 

 lication. 



