THE AMATEUR'S KITCHEN GARDEN. 
171 
Tound a stage, before it takes a direct return along the back 
wall, to the boiler. This cool end is also used for green- 
house plants. 
Referring to the outline sketches, it will be seen that the 
heating apparatus is in the shed where the furnace was 
originally placed for the flue. The conical boiler, b, is in 
the centre, the flow pipe leaves it near the top, and the 
return pipe enters near the bottom. The flow has two 
connections with the tank, one at the end nearest the boiler, 
and one at the end most remote ; ether of these can be 
closed, by means of a stop-cock, and ii the fire has been al- 
lowed to get low, or if severe weather fenders it necessary to 
obtain a little extra heat quickly, we 
generally close one of the taps for a 
short time, until a brisk circulation 
is established. There is an extra 
length of pipe attached to the flow 
side, to carry heat beyond the tank 
into the cool end; but this we seldom 
use, the return pipe being almost 
always sufficient. The movement of 
the water from the pipe into the tank, 
T, is indicated by arrows, and the 
pipes are distinguished by the letters 
— f the flow, and R the return. By 
a little variation of these particulars, 
such a house as this might be used as an early vinery and 
peach house ; the back wall and the trellis would afford good 
spaces for training, and instead of planting in the bed over the 
tank, it would be necessary to make a border at the back, and 
use the tank-bed either for plunging stove plants in pots, or 
planting them out in it. But as one particular form of house 
will not suit all tastes and circumstances, we present sections 
of four different but nearly related structures, well adapted 
for cucumbers, as also for forcing strawberries and kidney 
beans. 
The lean-to houses are not the most desirable form for late 
autumn and mid-winter work, as they scarcely give sufficient 
light at that season, unless a portion of the back wall below 
the ventilators is of glass — say a 4 feet depth of glass running 
the whole length. Span-roofed houses are the most desir- 
able on account of the greater body of light, and they are 
