1868.] Practiced Carpentry and Joinery. 317 PRACTICAL CARPENTRY & JOINERY W DETAILS FOR PICTURE GALLERY. "E will now proceed with a detailed description of the several parts, from the annexed plate, on which they are drawn to a large scale. A is the pier, or one of the upbearing portions of the side wall of the building, 2 feet 6 inches long by 18 inches thick. B is the iron bracket, that forms the curve ; and gives support and stability to the whole. C C are furring-pieces, on each side of the iron bracket, taper- ing from the window frame, in the wall, to°the curved rib. This surface, being made perfectly white, will add to the re- flected rays ; while avoiding all offsets for shadows. D is a section of one gir- der, likewise showing the section of the iron bracket E below it. F is the cor- nice, running on all the ribs, transverse- ly and horizontally ; and, also, follow- ing the curve to the cornice, on the wall, atTthe spring of the arch. G is the flooring-joist, giving the bearing on the cleats, that are nailed to the sides of the girders I ; and J is the sash in the curved ceiling, exhibiting the connec- tion with the ribs. K is a vertical section of a part of the outer brick walls. L is the iron brace, or quadrant, displaying the shoe and its bearing on the wall. M is the cornice, on the wall, at the springing-line of the arched ceiling of glass. N is the moulded rib on the arch. is a section of the same. P is a plate of iron, about 2£ inches wide by about of an inch thick, with a small turned-up flange on the outer edge, even with the plastering on the walls, and a simpTe quirk above it, as is usu- ally formed beneath the bottom mem- ber of a cornice. Brass or other com- position hooks are made to fit neatly on this flange, and play in the quirk. The cords of the pictures are attached to these hooks, which can be shifted to any point desired, as the flange is made to extend around the entire wall. This contrivance was introduced into the Picture Gallery of Mr. Harrison, at his own suggestion ; and proved to be a very great convenience, since univer- sally adopted. R is a vertical section of the brick wall, on a smaller scale. S is the full quadrant or curve of the arch on the same. T is the girder, exposing the connection with the flooring joists, the iron bracket and the joint-bolt, as they extend through the wall, to bind the whole together. U is the floor, and V the panel on the flat ceiling. W shows the face of the cornice on the wall, at the spring of the arch. Y a section of the rib and the depth of the panel, with moulding at Z, also affords a section through the girder, with the bearings of the joists G G ; and X is the face of the rib. P P is the iron flange, with the plate, as inserted in wall, drawn to a lai'ger scale. From the above description we think a clear idea can be formed of the advan- tages, which this plan possesses, over the ordinary style of Picture Gallery, so objectionable to exhibiting artists, who always desire tbe light thus; not to speak of the great aduition of wall surface, which this construction gives. But we have already descanted freely upon its merits, and will now leave it with our commendation. It is as necessary for the Artist, to have a favorable light for the clue expo- sition of his work, as it is for him to have the i-equisite colors, wherewith to embody his ideas on the canvas. For it is through the aid of Nature's light that he must present Nature's effects.
