148 THE FORCING GARDEN. 
can be given for double flowers in the next generation. 
So much for double Balsam seed saving. 
The cost of such a house will be but an item com- 
pared with general glass-house building, as no fire heat 
is required for Balsams after the seed is well up. If 
the house has a span roof, which is no doubt the 
best, the plants will then get an abundance of light 
and air, and sun all round them. It should be set 
running north and south. My object for this is, that 
when a span roof is so arranged, each roof gets a due 
proportion of sun. The Balsams will not occupy the 
place before May, and at that time of the year a house 
so situated will get many hours of both early morning 
and afternoon sun, and the hot mid-day sun, which 
' has a destructive influence upon open flowers, is ob- 
viated, although no want of good light is felt. If the 
house is glazed with eighteen- or twenty-inch squares 
between the rafters, an abundance of good light, equal 
to everything that can be desired, will be the result. 
The cost may be fairly estimated at 40/., besides 
the staging; and this estimate includes everything 
else—fixing, painting, brickwork, &c., as follows :— 
Eighty-four rafters, four and a half inches by one and a 
half. 
Three hundred and fourteen feet super three-quarter-inch board- 
ing. 
Forty-four posts, four and a half inches by three. 
Two hundred and forty feet run of plate, four and a half inches 
by two. 
One hundred and forty feet run of fixed sashwork. 
Two good ploughed and tongued ledge doors, hinges, locks, 
and keys. 
Sixty feet ridge board. 
One thousand three hundred bricks, 
Masons’ work, and mortar. 
