January.'] hot-house. 133 
Angle of the glazed Roof. — The pitch of the roof is usually 
varied to agree with the design of the house, and the size 
of the plants to be grown therein. Where pleasure and orna- 
ment are the principal objects, the angle should be about 33° 
from the level line ; but a few degrees of inclination either 
way is of minor importance. 
Materials for glazing Sashes. — Carolina pine is the best 
material for the wood-work, as it is not so subject to decay 
from moisture and heat as the other kinds of pine wood. 
The frames or sashes can be of any convenient length, not 
exceeding ten feet, and about three and a half or four feet 
wide, and made from plank two inches thick, divided so as 
they can be glazed with glass six inches wide. 
Of Glazing. — The pieces of glass should not exceed six 
inches by eight, though six by six is preferable ; the lappings 
about one quarter of an inch. The frames ought to have 
two coats of paint previous to glazing, and the glass bedded 
in putty. Some prefer the lappings to be puttied also. It 
is our opinion that in a hot-house these should not be puttied, 
but, in the green-house, the closer they can be made the 
better. 
Of Shutters. — These should be made of three-quarters of 
an inch white pine, and bound on both ends and sides, having 
a cross-piece in the middle of the same. They ought to be 
painted at least once in three years. 
HOT-HOUSE. 
JANUAKY. 
At all times, be very careful of the temperature of this 
department, and more especially at this season of the year, 
as a few minutes' neglect might materially injure many of 
the delicate plants. The thermometer ought to range 
between 55° and 65°. In fine sunshiny days admit a 
little air by having some of the top sashes let down one, 
