Another clever device of Philadelphia ironworkers was to make the foot scraper a part of the iron stair rail. Usually in such a scheme it was also made part of the newel treatment on the lower step of the stoop, but at Seventh and Locust streets, for example, it stands on the second step beside and above the ornate round newel with its surmounting pineapple. Here, as in the case of the simpler handrail in South Seventh Street, one of the iron spindles of the rail is split about a foot from the bottom, and the two halves bent respectively to the right and left until they meet the next spindle on each side, the scraper bar of ornamental outline being fastened across from one to the other of these spindles below. The principal charm of the South Seventh Street rail lies in its extreme simplicity, the twisted section of the spindles near the bottom being a clever expedient. The pleasing effect of the design at Seventh and Locust streets is largely due to appropriate use of the evolute spiral band. Only a little more ornate than the South Seventh Street stair rail is that in South Fourth Street. A special spiral design above the foot scraper, however, virtually becomes a newel in this instance. The same is true of another much more elaborate stair rail at Seventh and Locust streets with its attractive diaper pattern between an upper and lower Grecian band, the whole grille being supported by a graceful three-point bracket. CHAPTER VIII WINDOWS AND SHUTTERS Philadelphia windows and window frames during the Colonial period were not so much a development as a perpetuation of the initial types, although of course some minor changes and improvements were made with passing years. From the very beginning sliding Georgian sashes were the rule. Penn's house has them and so have all the other historic homes and buildings of this vicinity now remaining. There are none of the diamond paned casement sashes, such as were employed in the first New England homes half a century earlier, for builders in both the mother country and the colonies had ceased to work in the Elizabethan and Jacobean manner and were completely under the influence of the Renaissance. In the earlier houses the upper sash was let into the frame permanently, only the lower sash being movable and sliding upward, but in later years double-hung sashes with weights began to be adopted. Stiles, rails and sash bars were all put together with mortise and tenon joints and even the sash bars were pegged together with wood. The glass was set in rabbeted edges and held in place by putty according to the method still in use. [Illustration: PLATE LX.--Detail of Stair Ends, Carpenter House, Third and Spruce Streets; Detail of Stair Ends, Independence Hall (horizontal section).] [Illustration: PLATE LXI.--Chimney Piece in the Hall, Stenton; Chimney Piece and Paneled Wall, Great Chamber, Mount Pleasant.]