2 MAN, THE ANIMAL 



depending on the mental traveling outfit of him 

 who journeys forth. For the scholar there are 

 familiar landmarks which keep him from losing 

 his way. These consist in the recognition of facts 

 which he himself or others have verified, and from 

 which he deducts logical conclusions. To the un- 

 trained mind the journey is more like a holiday 

 excursion when a new place is visited. Streets, 

 business and buildings afford new revelations and 

 all alike are interesting and suggestive. He does 

 not understand the relative importance of what 

 he sees and like a child each new interest is pic- 

 tured in glowing terms. Such is a charitable ex- 

 planation of the numerous fads and fancies that 

 occupy much of our thinking about the life of man 

 to-day. 



Ever since man began to ponder on the source 

 and significance of life, the subject has been one 

 of supreme interest to him. Each decade sees 

 some mystery solved which enables us to compre- 

 hend more clearly the events and forces that shape 

 life. But for the most part these discoveries are 

 safely tucked away in scientific monographs which 

 but few read because they are couched in language 

 too technical for the general reader. Those minds 

 that are ever aiming to extend the limits of knowl- 

 edge are too much interested in their researches 

 to pause long enough to translate their results into 

 popular form and indicate their bearing upon 



