Greenhousk COXSTEI 



•t'TION. 



u 



For a purlin, inch i^ipe is neat and strong. See Fi,^:. S. 

 Let it be supported by uprights every eight feet, and 

 see that they rest on a solid base, a stone or small brick 

 pier. Before glazing, the purlin should be fastened to 

 each bar by means of screws and a narrow band of 

 ^lleet iron or tin. The ridge should be supported by 

 inch and a quarter pipe. Iron plates are kept in stock 





Pig. 9. 



by builders which can be fastened to the ridge and the 

 pipe secured to them by a thread. In the absence of 

 these, substitutes may be easily made of hard wood as 

 shown in Fig. 9. A hole of suitable size is bored in 



