No. 23. Very eaily stage; infection of twijs in top of trees, at upper right- 

 hand side. Lancaster county, Penna. — i-hotogiaph by Prof. Collins. 



Xo. 1:4. Type of diseased ciR'Stuut tn-(j (Hi Lolm- Island, New Yurk, 

 characteristic sprouts. — Photo"r<i})h hij Prof. Collins. 



showing 



