334 FORCING GARDEN. 
Fig. 39. 
IX \\ 
the front wall, they are not exposed to have their roots 
stunted in passing under the flues, and through the inte- 
rior soil of the house, which, in spite of every assiduity in 
watering and manuring, is apt to become hard and impo- 
verished. Further, it has been estimated that, as far as 
roof and glass are concerned, four or even five such houses 
may be erected at the same expense as three of the com- 
mon form. 
In Holland, peaches are forced in pits resembling the 
common hotbed or melon-pit of this country. The trees 
are trained on a trellis-work near the glass, and the air is 
heated by the fermentation of stable-dung linings. The 
method has been partially adopted in this country, with, 
however, the use of hot water. When garden architects 
shall cease to be anxious about making all forcing-houses 
ornamental structures, this will probably be the general 
form in which early and tender peaches will be cultivated. 
. The pruning and training of peach trees in the peach- 
house does not differ materially from the practice out of 
doors. The sashes having been removed in the autumn 
are replaced about New Year’s day. Fire-heat is com- 
monly applied about the beginning or middle of February; 
but where there is a large suit of houses, and an extended 
