106 
may be graduated by any of the simple means in common 
use. Another point is involved in the principle of a north light. 
We are anxious to prevent what is termed “burning”; for most 
of the evils which happen to glass structures in small establish- 
ments, occur through the want of air being given betimes in the 
morning. Now we are persuaded that quite as much sun- 
shine, on the average, will enter the space of the southern 
portion, as the amateur can manage, — especially with our im- 
proved glass ; and through the north slope will enter a subdued 
light, which will be found exceedingly beneficial to the inmates 
of the frame — especially to the row of pots which may occupy 
the shelf marked b. The flat roof was also planned for similar 
reasons; for, however fine it may sound, to discourse about the 
principle of light abstractedly considered, many indeed are the 
cases in which it would be far better for the amateur to possess 
a modified amount of this necessary, yet powerful, element. 
We may here add to the foregoing description, that we in- 
tend the front sash also to lift up to any required height ; this, 
in reality, being the workman’s side of the pit; where all the 
operations of filling or emptying may be carried on with con- 
venience. Both this and the north slope may be made to lift 
by means of bolt hinges, which are very simple and durable. 
Some little management will be requisite, in order to prevent 
drip occurring at the apex ; this, however, will be readily 
accomplished, by the use of a strip of thin oil-cloth, or similar 
material, impervious to water. 
It will now be necessary to say a few words regarding the 
brick pits, which, as before observed at page 103, are of a fixed 
character. As shown by the section given, a portion thereof 
will be above the ground-level; and if protection in the char- 
acter of warm manure, or even straw, be used, a somewhat un- 
sightly effect will be produced, unfitting any portion of the 
garden which is in high keeping. Those who adopt these 
structures, therefore, should set out with definite plans, in order 
to avoid disappointment. We shall, in the course of our re- 
marks, so far glance at the culture of the objects ennumerated 
at pages 100 and 101, as to be able to assist amateur gardeners 
in carrying out such objects. We now offer a few remarks on 
Opaque Protectors. In point of size it is obvious that 
these must be exactly of the same width as the glazed pro- 
