GENERAL CONSIDERATION OF PLANT DISEASES 287 



Fig. 115. — Unhappy vase-shapei.l white elm, I'ini:, ,, ', . , <,..>i. luo yards south 

 of a happy larger elm both growing on the outwashed plain, Westbury, L. I., July, 

 1915- 



Fig. 116. — Wind-swept white poplar, Populus alba, Nantucket, Mass., August, 1915. 



