??88 THE FOrvCING GARDEN. 



rally be four stripes or rows of panes in the sash ^ 

 and if the lights are not all made moveable, at least 

 every alternate one should move. * 



Of Glazing and Painting. 



Crown-glass only should be used in hot-houses, as 

 being capable of admitting more light than green 

 glass. I was formerly of opinion, that the laps in 

 glazing should not be puttied up ; but since con- 

 triving the ventilators, as described above, I have 

 altered that opinion, and would advise that they be 

 ■filled with blue or black putty. It is a great saving 

 in the breaking of glass ; and also of fuel, in stormy 

 weather. The laps should not be more than a quar- 

 ter of an inch in breadth; and the glazier should be 

 careful to fit the panes to each other, not reversing 

 the bends ; by which they are less liable to break, 

 than v/hen laid in accidentally, some round, and 

 others hollow. 



Every part of the framing of hot-houses should be 

 well painted, and kept so. They should never be 



* On account of the high price of timber, some arc now con- 

 structing the framing of hot-houses of cast-iron. I would beg 

 leave to remind such, that there is nothing so prejudicial to ve- 

 getation as the dripping of rusted iron ; and would advise, that 

 the frames be well painted, and frequently pointed, in order to 

 prevent the bad effects of irony water falling on the foliage and 

 fruit. I am of opinion, however, that iron-framed hot-houses 

 will soon get out of fashion. From the quantity of water that 

 must be used, in order to keep the plants in health, the frame* 

 must be often moistened, and xvill corrode. 



