SIDE-AIR. 37 
the end of the season, when the fruit has been gathered, and 
the object is to get the wood thoroughly matured, vines and 
other fruit trees cannot be too freely exposed to the influence 
of fresh air. As already stated, however, front or side 
ventilators are not required in cucumber-houses, yet it is 
advisable to put in a few small ones at intervals, for the 
reasons already stated. 
In structures of the better class, this is usually pro- 
vided for by putting a wooden framework, from lft. 
to 3ft. or more in / 
depth, on the top of 
the side walls, such 
framework being fitted 
with glazed lights or 
sashes, either fixed, 
or hung from the upper 
plate, or rail, to be 
opened and closed at 
will, and thus admit 
air more or less, when 
required. This plan BIG.-22- 
necessitates the employment of two ‘‘plates’—the upper 
or eave-plate (A in Fig. 6), which carries the rafters, and 
a lower one, or “sill” (B in the Fig.) ; but it is decidedly 
the best system, and affords a very handsome appearance, 
when properly proportioned. 
Louvres.—Another method of admitting air at the 
bottom, and applicable to houses in which there is no glass 
at the sides or front, is by means of what are termed 
‘‘ louvres.” These are really wooden boxes built into the 
side walls, a few feet apart, and fitted with sliding doors or 
, 
