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that their tops were badly infected; every one in fact. This 

 shows that when you find a focal center, it would be advisable 

 to keep on cutting all around the focal center until you have 

 taken every infected tree, and not to do]>(Mid on surface indica- 

 tions. 



You may look at the stump with a microscope and you may 

 not find any spores; for I will tell you that I have hunted for 

 surface indications of the blij^iit for the past few years in my 

 tract, and never found indications of the bark splitting or spore 

 (lust at the roots or base of the stump, until last year, yet the 

 tops of tiie trees, in certain sections, are all dead; they started 

 dying several years ago. 



I want to say one thing more. The farmers can help the 

 Pennsylvania Chestnut I^light Commission by starting to do 

 some of the work of inspection themselves, and if in doubt, may 

 call on the Commission for advice and information. The Com- 

 mission is willing to send men out to help you to locate the 

 blight and tell you Avhat to do. I will also try to help you, or, 

 if you will send your foresters to my tract near Mt. Gretna, I 

 will try to help them. 



I have discovered a new waj' of finding the blight which T 

 wish to present to this body for what it is worth. I want to tell 

 you how you can see the blight even ninety feet in the air on 

 what we call top-infected trees. You place your back directly 

 toAvards the sun, half close your eyes and then look up along 

 the top part of the tree, and if there is any blight in the cracks 

 of the bark in a direct line with the rays of the sun, you will 

 find the yellow s])ores highly illuminated. Under any other 

 condition you Avould not see these spores, as they would be 

 hidden by the shadows cast by the bark. Now, say in two hours, 

 after the sun lias illuminated another i>ortion of the tree, you 

 had better go through that tract again. In other words, start 

 (*ut going througli tlie tract by one route so planned that during 

 different times of tlie day you will have passed the same tree 

 several times, and each time place the sun directly back of you, 

 and you will be surprised with the results, I think Mr. Fox, (if 

 he is here), will verify what I have said. Both of us spent 

 three days in inspecting an area of trees, and did not find an 

 infected tree. But, one morning, on that coldest day we had for 



