RESEARCH ON XYLEM AND PHLOEM II7 



One feature of all the investigations of plant structure mentioned might be 

 stressed again: the large amount of research in this field necessary to make a 

 noteworthy addition to our knowledge. To many of us, nevertheless, a study 

 of anatomy or of some other phase of morphology is a satisfaction in itself 

 if it provides even a small, but well-substantiated, addition to the literature. 

 Viewed as a whole, highly satisfactory progress has been made during the 

 last fifty years in anatomical research. And just as cytology was so obviously 

 invigorated by the demands made on it by genetics, so we may expect 

 anatomy to be further invigorated in the next fifty years by demands from 

 a wide variety of other disciplines in plant science. There is no attainable 

 limit to what may be learned or to how it may be put to use. 



