196 THE KITCHEN-GARDEN, [chap. vii. 
eight feet high, will produce better fruit than 
walls of ten feet or twelve feet, which is the 
general height; and besides they have the 
advantage of not throwing so deep a shadow 
over the garden. Of whatever height the 
walls may be, they should always be in 
straight lines; as the various expedients 
which have been from time to time adopted, 
of curved or zigzag lines, have been found not 
to answer in practice, but to produce eddies 
and currents of wind exceedingly injurious 
to the fruit. The garden wall should have a 
slight stone coping; and where the trees are 
likely to want protection, strong hooks, or 
holdfasts, projecting from the wall, should be 
built in at regular distances for the conve¬ 
nience of suspending the mats or bunting 
that may be employed; or supporting a deep 
wooden coping. Hot or Sued walls are not 
desirable, as they are very expensive and 
troublesome, and of very little use. 
The walls should be built on good, sound, 
and deep foundations, but on no account on 
arches; as it is of importance to the gar¬ 
dener to confine the roots to the border in 
front of the wall, which is under his control. 
