16 THE BOOK OF THE PEACH. 



of three bays and worked throughout, as advised 

 above, by continuous gear, having curvilinear lifting 

 and lowering rods. The roof should be glazed 

 with glass twenty-one ounces to the square foot, 

 using panes eighteen inches wide and from eighteen 

 to twenty-four inches long, the lengths of the panes 

 being determined by the length of rafter used and 

 the number of such stock sizes that are used with- 

 out being cut. Then bed these in best white- 

 lead putty, sprigged on top, putting four brass 

 sprigs to each pane. In glazing, leave out the 

 top panes in every fourth and fifth pair of rafters 

 for the ventilators to cover when glazed with two 

 squares same size glass, a transom, one and a half 

 inch by three inches, being cut to fit in between 

 and flush with both upper and lower surfaces of the 

 rafters, so as to enable the ventilators to shut 

 down quite close on them. Allow a lap of a 

 quarter of an inch in glazing. 



The brickwork prepared in readiness for the 

 erection of the structure, which is now, so to speak, 

 ready for fixing, should be back wall from twelve 

 to fourteen feet by fourteen inches up to within 

 two feet of the top, when nine-inch work will be 

 sufficient width. The recess thus formed will afford 

 space for a row of strawberry plants, or tea-roses, 

 in six-inch pots, to stand on during the process of 

 forcing. A surface coating of cement should be laid 



