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 w^ell 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 feeb 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. 



