Plate XXVII. — Winter-injured IVIaple Tree Trunks. 

 A, Acer sacchamium in a wind-swept lawn, midway between two large buildings which 

 stand to east and west; injuries occurred on both north and eouth sides; tree failed to leaf 

 out in 1912. B, Acer platanoides, on north and south street, wixh injury on north side 

 showing double regeneration and exposed wood below; another injury near base (at X) 

 occurred in winter of 1910-11. 



(Photographed, A in July, 1911, and B in July, 1912.) 



