148 



— a mail can go after the scale. It takes the State, and miicli 

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

 travels faster than tlie scale. 



A National Scientific Campaif/n, or a Nationiil l^l(iii(/ii/) l''i;/lil. 

 An Exanvple from Africa. 



We have national corporations, national parties, national co- 

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

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

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

 we will. 



We have a si>len(lid example in the South African cattle 

 plague. It swei)t 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 tr^^ the same with the 

 chestnut blight. 



An Example from the Peach Yellows. 



Tlie j)each yellows is a disease of which we know just two 

 things. The hrst is tliat 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 

 (juarantine in operation, and the disease still unknown, these 

 same localities have more peach trees than ever and are again 

 ]>rosperous. 



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, A\hi(li is, practically, sure and (piick death, 

 and so contagious that a stal)leman can cai'ry it miles in his 

 clothes, broke out recently in I'ennsylvania in many places. Yet 

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



