IOWA ACADEMY OF SCIENCE 
72 
opportunities for the diffusion among the youth of the state of a knowledge of 
the geology of the state as well as of general geology are unexcelled anywhere. 
It appears from a hasty review of what has been done in Iowa geology during 
the past quarter century that an advance has been made that has involved a 
critical investigation of every phase of the subject both in the way of the in- 
dustrial interests and of pure science which, after all, in its ultimate results, 
is certain to prove of economic value as well and these investigations have been 
made with such efficiency by those who have given their tinae and effort 
to them that Iowa has great reason to he proud of the work and the workers. 
To he sure, much remains to he done. The very results secured have opened 
up new problems in some cases and it is undoubtedly true that when these new 
problems have been solved, they in turn will uncover yet others. It is diffi- 
cult, if not impossible, to reach the ultimate in any direction. 
