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5The rails will be apportioned thus: divide the height into five parts, of which assign two to the upper portion and three to the lower; above the centre place the middle rails; insert the others at the top and at the bottom. Let the height of a rail be one third of the breadth of a panel, and its cymatium one sixth of the rail. The width of the meeting-stiles should be one half the rail, and the cover-joint two thirds of the rail. The stiles toward the side of the jambs should be one half the rail. If the doors have folds in them, the height will remain as before, but the width should be double that of a single door; if the door is to have four folds, its height should be increased.
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