CONSTRUCTION OF THE VINERY 17 



purlines, which should be two and a half inches by 

 three and a half inches, and bevelled to admit of the 

 rafters resting properly thereon when nailed to them. 

 Other items of wood necessary to the erection of a 

 house of this description are as follows : Wall and 

 end-plates, four .inches by five inches; end-rafters, 

 three inches by four inches ; end and division bars, 

 one and a half inches by three inches ; a piece of 

 wood, to be nailed to the top end of rafters, one and 

 a half inches by three inches, rabbeted in a line with 

 the bed of rafters for the top squares of glass to rest 

 on, this being capped by a piece of wood two inches by 

 two inches, with the two upper angles slightly rounded 

 for securing the water-tight hinges of ventilators to 

 when fastened longitudinally on the upper surface of the 

 rafters immediately under the coping ; drip, one inch by 

 three inches ; door frames, three inches by four inches 

 (the lintel being bevelled to prevent water lodging 

 thereon), with oaken sills of the same size j doors, six 

 feet six inches by two feet eight inches, the doors being 

 either all wood, or made of one half glass, as may be 

 desired, and hung on substantial brass butts and pro- 

 vided with brass mortice lock and suitable furniture. 

 The woodwork should receive two coats of good white- 

 lead paint before being fixed and one more afterwards. 

 Each house should be provided with a liberal supply of 

 roof ventilators, these being hung in the manner indi- 

 cated above at intervals of about four bays and worked 

 throughout 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 twenty - two inches long, 

 these being bedded in best white-lead putty and sprigged 

 on top, putting four brass spriggs to each pane. In 

 glazing, leave out the top panes in every fifth and sixth 

 pair of rafters for the ventilators to cover when glazed 



