220 TRANSACTIONS OF THE CANADIAN INSTITUTE. [VoL. II. 



accept a post with which more or less disagreeableness is necessarily 

 associated. 



I think to all thinking men the necessity will appear for the adop- 

 tion of some such measures ; for no more right has a man to keep stand- 

 ing in his orchard a diseased tree which is apt to contaminate and 

 destroy his neighbor's trees, than he would be justified in allowing 

 infectiously diseased animals the liberty to roam the roads and fields. 



Treatment. — Many things have been tried for the allaying of the 

 disease, but as yet no chemical substance has been found to cause an 

 alleviation of the affection. 



To prevent its spread, the immediate destruction of the trees is the 

 first thing necessary, and now that we have the disease so much with us, 

 care in the cleaning and disinfecting of the pruning knives after each 

 tree has been attended to, would perhaps further stop the disease, as the 

 tree may be affected before being apparent to the eye. For such pur- 

 poses I should recommend two sets of knives, and while working on one 

 tree with one set, let the other be lying in i in 40 solution of carbolic 

 acid, which any druggist can make up. 



As to whether any remedy can be found for the diseased trees, it can- 

 not be replied to )'et, and with the great and grand advancements which 

 bacteriology has made of late in the treatment of disease, both in man 

 and animal, I would not be justified in hazarding any opinion, but do 

 hope that some method may yet be discovered, which will save the trees, 

 although at present I am very dubious. That we can do much in 

 stopping the progress of the disease by the total destruction of the dis- 

 eased trees cannot be doubted, and let us hope that other results may 

 follow. 



Lastly^ I am sure that Dr. A. B. Macallum unites with me (as he 

 went with me on each excursion to Niagara) in expressing sincerest 

 thanks to the gentlemen who entertained us so very kindly, placed 

 their trees and orchards at our disposal, and were so kind in coming for- 

 ward and helping us in every way possible. I myself thank Dr. Mac- 

 allum for his most valuable assistance on each occasion, and it was 

 through his suggestions that the above work was undertaken. 



