WALLS AND TRELLISES. 165 



the walls not colored, as directed ; tin is affording 

 great assistance in maturing the buds upon fruit-hear- 

 ing shoots, so that the trees may be productive. In 

 cold and wet seasons, without such aid, I should not. 

 have been able to obtain ripe buds upon fruit-trees 

 under my care. This I have had ample proof of by 

 the unfruitfulness of those trees which are against 

 walls not colored, at the same time that trees against 

 colored walls were abundantly fruitful. The wall 

 being colored is also a preventive of insects harboring 

 in it and also tends to keep it dry. 



" The growth of young trees is much promoted by 

 the coloring and they are sooner brought to a supply 

 of fruitful buds." 



In all cases in which vines are trained in front of 

 walls or fences, it is important that a space of from 

 six to twelve inches be left between the wall and the 

 trellis to which they are fastened. If trained directly 

 to the wall, the vine will not only be subject to mil- 

 dew, but ventilation will be materially inteiTupted. 

 The bunches also, are liable to injury when lying 

 against the surface of the wall. 



Walls may, of course, be constructed of any mate- 

 rial, brick, stone or concrete. Brick is probably the 

 most suitable material, though, as plain walls can bo 

 rapidly and cheaply built of concrete, it is piobable 

 that it might pay to erect them on an extensive scale 



