42 THE FORCING GARDEN. 
5s. per foot run, that is, at half the advertised prices. 
No top coping of glass is required ; in fact, such things 
are useless, and I may say they are positively detri- 
mental on account of the dryness they cause to the 
border about the trees and the want of ventilation at 
the top. It is essentially necessary to obviate any 
close confinement at the top for wall-Peaches, especially 
from the time the trees are in flower. Those who 
recommend the close glazed top coping lights are no 
gardeners. 
These sashes require nothing more than a board ven- 
tilator at the top, made to open and shut ad lubitum by 
cords fixed on the outside and running through a pulley 
fixed in the wall, with the cord passing through the 
run at the top so as to come to the outside in front of 
the lights. Then the ventilators can be opened and 
shut without opening the sashes, and the bottom being 
always open, a free circulation of air is secured at all 
times—a thing of immense importance in all Peach 
and Plum growing. The runs are of 1-inch yellow 
deal for the bottom, with the top cap fixed on iron 
wall-brackets as is shown in fig. 14. The sides may 
be of three-quarter stuff, the inner sides of the bottom 
run being made a fixture, merely nailed on to the 
bottom ; but the outer side of it must be made to open 
at distances of 4 feet, to allow of the lights being 
taken out when required. These openings must be 
hinged on the bottom and held in position by a couple 
of staples and a hook. The top run may be a complete 
fixture. 
If the ends of the sashes and the runs are made 
quite smooth no rollers will be required, as a little 
grease rubbed now and then in the bottom run will 
