COMMERCIAL ROSE CULTURE 



The walls of the house may be of wood, or of concrete up 

 to the glazing sill, which should be so placed as to allow from 

 two to four feet of glass on the sides of the house. A great 

 many builders use a spliced sash bar on long roofs; there is 

 often more or less drip in a house where this is used, which is 

 objectionable. It is possible to obtain sash bars in one piece, 

 up to thirty-five feet in length, from some firms. 



Sixteen by twenty-four-inch glass is the size commonly used 

 and this is generally laid with the long part of the glass up 

 and down the roof. By laying the glass the twenty-four-inch way 

 you save one sash bar in four, but the bars must be made 

 heavier and there is more danger of breakage from snow and 

 ice, so that it is advisable to space the bars about sixteen inches 

 apart to admit of the glass being laid in this way. 



It is best to have continuous ventilation on both sides of the 

 roof. The ones on the north side will not be of use in the 

 Winter months, but all through the warm weather it is ad- 

 visable to ventilate on both sides and to allow the air to circu- 

 late through the top of the house instead of beating down on 

 to the bushes, as it must do where there is only an opening on 

 one side and the wind is blowing in on that side. 



The house ought to have a good coat of paint before erec- 

 tion and another one afterward. 



If a natural slope exists on the ground where the boilers 

 may be placed below the level of the houses, without digging 

 a cellar, it is of great help and will save money as well as give 

 good results. There is nothing to beat a good gravity system 

 where this is possible. If this is not feasible, on account of the 

 cost of excavating, the boilers may be set on top of the ground 

 and the condensation returned by a trap or a pump. 



Provision should be made for a manure tank, a room for 

 grading and storing the cut flowers, a potting shed and a place 

 for propagating young stock. There should be room, under 

 cover, to store enough loam in the Fall to take care of the 



