Chippendale introduced a pierced splat between the rods of the back. These alterations simultaneously strengthened the chair while giving it a light, airy appearance. Knots that fell out were replaced by another piece of wood cut to fill the hole. The chair is reinforced at the center back with a top batten, and supported by turned balusters, those at the front being vase-form.
There are even Windsor settees. Birch and maple were used for legs. This information appears in the upper left corner of the page, with the label "Appraised On.
Terminology sometimes quite different. Aftermore than one piece of wood was used for the seat pieces glued together.