Figure 1 Detail of the rear face of the bow of a bow-back Windsor armchair, John Letchworth, Philadelphia, Pa., ca. 1787–1792. Yellow poplar (seat), maple, oak, hickory, and black walnut (arms and arm supports) (microanalysis). H. 37", W. (arms) 20 7/8", D. (seat) 17 3/4". (Courtesy, Winterthur Museum, acc. 57.99.2.)