[Illustration: Figure 51.--1870: THE USE of a new material prompted a departure from the traditional in shape and encouraged surface elaboration. The tendency, however, was short lived and the mass-produced metallic plane rapidly achieved a purity of design as pleasing as its wooden predecessors. (Private collection. Smithsonian photo 49789.)] Occasionally, ruling taste is reflected in the design of the carpenter's equipment. Notable is the "gentleman's tool chest" (fig. 49) advertised in the pattern book of the Castle Hill Works. The bracket feet, brass pulls, and inlaid keyholes imitate the style of the domestic chest of drawers of the period 1790 to 1810--undoubtedly, features included by the manufacturer to appeal to a gentleman of refined taste. In contrast to this Sheffield product is the plate from Shaw's _The Modern Architect_. The concept of the builder-carpenter as a gentleman still prevails, although the idea in this American scene is conveyed in the mid-19th century through fashionable dress. The tools and in particular the tool chest reflect only the severest of functional lines (fig. 19, p. 196). In deference to ruling taste, some tools lost for a time the clean lines that had long distinguished them. The screwdriver, simple in shape (accession 61.46) but in little demand until the 1840's, occasionally became most elaborate in its factory-made form (fig. 50) and departed noticeably from the unadorned style of traditional English and American tools. The scalloped blade, influenced by the rival styles rather than a technical need, seemed little related to the purpose of the tool.[10] No less archaic in decoration was the iron-bodied version of the plow plane (fig. 51). The Anglo-American tradition seems completely put aside. In its place is a most functional object, but one elaborately covered with a shell and vine motif! Patented in 1870 by Charles Miller and manufactured by the Stanley Rule and Level Company, this tool in its unadorned version is of a type that was much admired by the British experts at Philadelphia's Centennial Exhibition in 1876. What prompted such superfluous decoration on the plow plane? Perhaps it was to appeal to the flood of newly arrived American craftsmen who might find in the rococo something reminiscent of the older tools they had known in Europe. Perhaps it was simply the transference to the tool itself of the decorative work then demanded of the wood craftsmen. Or was it mainly a compulsion to dress, with little effort, a lackluster material that seemed stark and cold to Victorians accustomed to the ornateness being achieved elsewhere with the jigsaw and wood? Whatever the cause, the result did not persist long as a guide to hand-tool design. Instead, the strong, plain lines that had evolved over two centuries won universal endorsement at the Centennial Exhibition. The prize tools reflected little of the ornateness apparent in the wares of most of the other exhibitors.