182 On the Foliage of Peach and Nectarine Trees. 



such shoots may be taken off with benefit to the elm tree. I think 

 the covering here recommended preferable to that of a net, as that 

 is usually employed. The expence of it is very small, and the 

 labour trifling ; and I think that it is better calculated to intercept 

 the heat, which radiates from the ground ; and the effects of such 

 radiating heat are, I believe, in particular states and degrees of the 

 temperature of the night, of no inconsiderable importance. I have, 

 in some cases, applied the wash to my trees before covering them, 

 and in others after ; and I think the last-named practice the best. 

 In making the wash, I use equal parts of flowers of sulphur, of 

 quick lime, and of soot. 



