296 



Notes and Gleanings. 



the entrance of a direct current of air ; i.e., when the wind is east, opening those to 

 the west, and vice versa : in span-roofs, they are reversed on opposite sides of the 

 house. It will be seen that the side-stiles of sashes are continued four inches as 

 horns to rest in the water-gutter at the foot. The gutter {d\ of wood or iron, con- 



tinues from end to end of the roof, being supported by chairs or saddles (<■) under 

 ventilators, and at ends set upon piers or walls forming the foundation of the house. 

 The dotted line under the open ventilator shows the course of a groove in the 

 weather-board fitted under the cap, and down the upper edge of large sash stileS 

 to conduct any drip from the ventilator or cap to the water-gutter. The sashes 

 rest against or upon a plate of wood attached to the back wall, to form lean-to 



