The Development Theory : A Review. 113 



In his heart he knows that underneath the theories that he 

 constructs there lie contradictions which he cannot reconcile. 

 The higher mysteries of being, if penetrable at all by human 

 intellect, require other weapons than those of calculation and 

 experiment. 



Without encroaching upon grounds appertaining to the theolo- 

 gian and the philosopher, the domain of natural science is surely 

 broad enough to satisfy the wildest ambition of its devotees. In 

 other departments of human life and interest, true progress is 

 rather an article of faith than a rational belief ; but in science a 

 retrograde movement is, from the nature of the case, almost impos- 

 sible. Increasing knowledge brings with it increasing power, and 

 great as are the triumphs of the present century, we may well 

 believe that they are but a foretaste of what discovery and inven- 

 tion have yet in store for mankind. Encouraged by the thought 

 that our labors cannot be thrown away, let us redouble our efforts 

 in the noble struggle. In the Old World and in the New, recruits 

 must be enlisted to fill the place of those whose work is done. 

 Sappy should I be if, through this visit of the Association, or by 

 any words of mine, a large measure of the youthful activity of the 

 West could be drawn into this service. The work may be hard, 

 and the discipline severe ; but the interest never fails, and great 

 is the privilege of achievement. 



VI. The Development Theoey : A Review.* 



By E. W. Claypole, Akrox, 0. 

 This little work is an unpretending but useful compilation 

 intended to put within the reach of intelligent readers some of the 

 fundamental facts on which rests the " Evolution Theory." As 

 the writers truly remark in their preface, " few, except special 

 students of the natural or physical sciences, really know what is 

 meant by organic evolution. Ask," they say, " the average 

 graduate of a high school, an academy, or even of one of our 

 minor colleges to state his conception of the theory. One is 

 ashamed to quote the ready but unmeaning reply, which not sel- 

 dom would be : Oh, I only know that Darwin thought we were de- 



* The Development Theory by J. Y. & Fanny D. Bergen. Lee & Shepard, Boston. 



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