82 DIFFICULTY IN CONVINCING. 



although simple, will require some care in its 

 application, to mind it is applied thoroughly as 

 directed on the packets, for I have the satis- 

 faction to state, it may be used over the bloom 

 buds in March, or the most tender shoots in 

 summer: it is the only effectual cure for 

 this disease ever discovered, that is not in- 

 jurious to the trees. Oils were at one time 

 much used for it, but they were found too 

 powerful ; indeed, I have destroyed many 

 young apple trees by applying sweet oil. Coal 

 tar has also been lately introduced, but that 

 can only be used to old wounds, and then it 

 makes a bad smell, and leaves the trees in 

 half mourning; it is a most dangerous thing 

 to apply to young trees, as I have seen trees 

 twenty years old destroyed with it, down to the 

 very roots, but this has been when applied all 

 over the principal part of the tree. 



THE DIFFICULTY ^IN CONVINCING. 



Par. 99. I am aware of the difficulties aris- 

 ing in persuading men against their own in- 

 clination, on what they are not personally 

 acquainted with : for in almost every separate 

 county in England, they have different ways 

 of farming, and each supports its own opinions ; 

 and this notwithstanding the wide dissemi- 

 nation of new and acknowledged improvements. 



