A BACKWARD GLANCE 289 



those which have preceded it and from those 

 which are to succeed it. 



And so, some of us — too many of us — ^not 

 confronted with the same necessity which irre- 

 sistibly leads the plant student into the study of 

 these forces — viewing only the single, apparently 

 unmoving picture before us, have concluded 

 that there is no forward motion — that there 

 has been no evolution — that there will be 

 none. 



The plant student, above all others, has the 

 greatest facilities at his hand for observing not 

 only the details of the picture which is now on 

 the screen — but for gaining glimpses — frag- 

 mentary glimpses— of pictures which have pre- 

 ceded — of piecing these together — and of real- 

 izing that all that we have and are and will be 

 must be a part of this slow, sure, forward-moving 

 change that unfailingly traces itself back to the 

 little simple cell. 



As we go further and further into the work 

 we shall begin to see the film fragments which to 

 workers in other lines are obscured, unnoticed, 

 unknown. 



We shall be able to observe details of the 

 process — carried home to us with undeniable 

 conviction — indisputable to any man who be- 

 lieves what he actually sees — which will give 



Vol. 1— Bur. J 



