246 
THE AMATEUR’S KITCHEN GARDEN. 
this pit may be attached to 
it be sufficiently powerful. 
dependent of the large pi 
any apparatus already at work, if 
Generally speaking, one large 
apparatus is much easier man- 
aged and more economical than 
a number of small ones. If, 
however, a small one only is 
wanted, a comparatively large 
furnace should be made, and a 
furnace door large enough to 
admit a good sized shovel, for 
nothing can be more trying to 
the temper of a stoker than the 
baby furnaces fixed by some 
country tradesmen. 
On referring to the plan, it 
will be seen that a flow and 
return two-inch pipes are shown 
in a chamber under the bed in 
which the plants grow; this 
space being separated from the 
bed of soil above by a loose 
flooring of oak slabs or rough 
boards. These two small pipes 
for bottom heat, will be found 
to give sufficient warmth to the 
soil without excess, except it 
. should be in very severe weather, 
when a good deal of fire heat is 
used in order to maintain the 
atmospheric heat ; then, at such 
times, the excess can be let into 
the house by opening the drain- 
pipes, laid through the wall for 
that purpose, whilst in summer, 
when but little atmospheric 
heat is wanted from the pipes, 
bottom-heat may be given, in- 
1, by turning a stop valve at s. 
piers ; h, sliding lights, seven feet long ; these slide under the fixed 
lights, k, so as to admit of any necessary operations in front part of 
house being done from without, as well as for air. j, door ; t, flow 
and return four-inch pipes, with vapour troughs ; m, ground line j jr, 
steps j s, return pipe. 
