248 On the Glazing of Hot-houses and Conservatories. 



to paint the rabbet, both the wood, and the portion of the 

 glass which will be covered ; not only will the penetration of 

 any moisture round the panes be rendered more difficult, by 

 the paint filling up every interstice, but the front putty will 

 adhere much more strongly to the painted, than to the un- 

 painted glass. Considerable advantage will be derived from 

 classing the panes, placing together, in one set, those which 

 are perfectly flat, and those which are not so, in another. 

 This is easily done by the glazier, either when cutting the 

 glass, or subsequently ; and each glass being used together, 

 much greater closeness of glazing, and neatness of workman- 

 ship, will be ensured. 



