June.] 



THE FRUIT GARDEN. 



415 



engine, in which lime-water or water alone may be used. But 

 no method is so effectual, as picking them off with the hand, 

 as already recommended. 



WATERING WALL-TREES. 



Continue to operate with the garden-engine on all kinds ot 

 fruit wall-trees, except such as are advancing to maturity, and 

 apply the water with force for the destruction of insects, and 

 for refreshing the trees : this operation should now be always 

 performed in the evening, that the effects of the water may 

 act for a longer time upon the trees. 



The expense of this operation in most gardens, where 

 water has not been laid on, as recommended in the early part 

 of this work, and practised by Hay and other eminent garden 

 architects, deters many from this useful branch of fruit-tree 

 culture; and others neglect it, thinking that what the trees 

 receive fr om rains and dews should be considered as sufficient. 

 Let those persons, however, for a moment reflect, that a tree 

 planted against a wall and constrained to it often in the most 

 unnatural position, deprived of the perpendicular dews and 

 rains by projecting copings, and exposed to a powerful sun, 

 the rays of which are reflected from the wall, so as consider- 

 ably to increase the temperature above that of a tree growing 

 as a standard, must require to be supplied with water arti- 

 ficially, with as much reason, and on the same principle, as 

 those plants which are reared under glass. 



