148 



a man can go after the scale. It takes the State, and much 

 better, all of the States, to stop the chestnut blight, for he 

 travels faster than the scale. 



A National Scientific Campaign, or a National til a ml -n^ Vujht. 

 An Example from Africa. 



AVe have national corporations, national parties, national co- 

 operation to make a meal even, and now we have got to make a 

 national organization to fight a tree enemy just as we would to 

 fight a man enemy. The problem is big, but we know how if 

 we will. 



We have a splendid example in 1,1 le South African cattle 

 plague. It swept for hundreds of miles, taking all cattle before 

 it as frost does the flies. Then the South African Governments 

 drew a quarantine line around it and fought it to a standstill 

 right there. The United States should try the same with the 

 chestnut blight. 



An Exam,ple from the Peach Yellows. 



The peach yellows is a disease of which we know just two 

 things. The first is that it is a sure kill for trees, the second 

 that it can be controlled by rigid quarantine. Before we. knew 

 the second fact, the disease had actually broken up communities, 

 as in the Michigan peach belt, and reduced land values from 

 one hundred dollars an acre to thirty dollars per acre. With 

 quarantine in operation, and the disease still unknown, these 

 same localities have more peach trees than ever and are again 

 prosperous. 



A Lesson from the Foot and Mouth Disease of Cattle in Penn- 

 sylvania. 



The foot and mouth disease in this State, which cost us the 

 life of one of the most efficient men we have ever had, namely 

 the brother of our Chairman, Dr. Leonard Pearson, the foot 

 and mouth disease, which is, practically, sure and quick death, 

 and so contagious that a stableman can carry it miles in his 

 clothes, broke out recently in Pennsylvania in many places. Yet 

 this State jumped on it, and by a sharp, stiff, stand-up fight, it 



