INTRODUCTION vil 
richer in interest, broader in its activities and 
its outlook, and sweeter to the taste. 
To this end men and women who have given 
each a lifetime of study and thought to his or 
her speciality, will contribute to the Library, 
and it is safe to promise that each volume will 
join with its eminently practical information a 
still more valuable stimulation of thought. 
Ernest INGERSOLL. 
