G 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. 



