Circular House for Forcing Vines, 
310 
41 
S H. sc. 
in writing, may perhaps not be altogether without use to some of your 
readers. 
My design is, to form a house in which the forcing may be continued 
throughout the whole year. It struck me that a circular one [fig. 41 ] 
would be well calculated to pro¬ 
duce regular crops of Giapes. 
I will suppose it to be from 40 
to 50 or 60 feet in circumfe¬ 
rence ; the front built so that 
the Vines may be taken in and 
out at pleasure, having a suffi¬ 
cient number of Vines accord- 
ding to the size of the house, 
and the quantity of fruit requi¬ 
red. These Vines should be 
introduced through the front, 
in regular succession ; five, six, 
or seven, every three or four 
months, exposing them again as the wood becomes ripe, and the fruit 
is gathered. 
Or the house might be parted into 4 divisions, [fig. 42] by glass par¬ 
titions, to answer for the 
four seasons, and by way 
of saving glass, the roof 
might have only one half 
framed and glazed, and be 
made to turn round on the 
front and centre plaits, by 
means of grooves and rol¬ 
lers, so as to cover any two 
of the divisions. I will 
suppose, to begin forcing 
in the spring, the summer 
division; would be covered 
at the same time, in order 
to be coming on slowly. 
When the spring crop is 
cut, the roof must be mo- 
42 
NORTH. 
SOUTH. 
ved over the autumnal division, and so on to the winter, covering* and 
exposing. The roof must be made to fix closely over each partition, 
&c. In a house about 45 or 50 feet in circumference, each division 
would contain six or seven Vines, Mhich with good management would 
produce about two hundred bunches of Grapes, so lliat the foiir di- 
