x AUTHOR'S PREFACE. 



accurate reproduction of that address. I have added it to 

 the present collection, for in it I have treated briefly what 

 is more fully discussed in the other articles. Its title to 

 the place which it occupies lies in the fact that it attempts 

 to bring the views enunciated in the preceding Lectures 

 into a more complete and more comprehensive whole. 



In conclusion, I hope that these Lectures may meet 

 with that forbearance which lectures always require when 

 they are not heard, but are read in print. 



THE AUTHOR. 



