182 Sloan's Architectural Review and Builders' Journal. [Sept., is suspended; and the outside poising- weights, O and P, which are adjusted in the usual way, and hung in the box, M, will be one-half the weight of the sash to which they are attached. By this centre arrangement is avoided the cum- brous mullion, necessary in constructing the ordinary double-box. The weight, with the pulley, will play just half the distance of the sash ; — thus : by raising or lowering the two sash, at the same time, the weight will fall or rise the same distance, corresponding with the movement of the sash in space. The elevation gives the sash all closed; and the section exposes the po- sition of the weights, in their respective boxes. Thus, L, L, show the boxes containing the weights with pulleys, and F, the parting-bead. N, N, the or- dinary side-weights, and G, the parting- bead. WINDOW WITH SLIDING SHUTTERS. In the accompanying plate, are ex- hibited the details of a window, fitted with sliding shutters ; the window shown from within the room. A rep- resents the plan ; B, the inside sill ; C, the sash-casing, with the shutters be- tween B and C ; and D is the outside - sill of the window-frame. E is the stone sill ; F, the wall ; and G and H are the lining on each side of the box for the sliding shutter. I is the panel-back on the elevation of the window-frame. J shows the lower section, out of the box, of one-half of the shutter, which slides each way. K is the upper sec- tion, within the box, in the wall ; L, the wall, as finished with the architrave and ■washboard ; M, M, the architrave ; and N, the washboard, with its top mould- ing returned up the back of the archi- trave and forming part of the same. is the sash ; P, the metal way for the sheaves of the upper shutter, and guide for the bottom shutter; R, the wall and vertical section below the sill, with sec- tion of the panel-back; S, the lintel, with section of architrave and window- frame ; T, the inside panel-jamb. 17, TJ, represents the sash on a large scale. V, the iron way in the centre, which is so formed that it will show a bead be- tween the sash ; and is rounded, on the top, for the sheaves of upper shutter, and below, for a guide for the lower shutter. A way will also be required on the sill for the sheaves of the bottom shutter. ORIEL WINDOW. Windows of this description are usu- ally placed on the second story of a building ; and, sometimes, extend up- wards through two stories. They are necessarily constructed of wood, being suspended as they are to the walls, and projecting out from them a considerable distance. The walls would not be capable of sustaining the weight of such a structure, if it were composed of any other material. The usual mode of supporting and securing these windows, is, to project the joists of the floor out, for the purpose. This is preferable to depending on fastenings in the wall, particularly where the window is large, and the walls are of the ordinary thick- ness, as is usually the case, in the construction of our moderate-sized houses. The floor of the Oriel Window should always be level with that of the room within, unless there are obstacles in the way beneath to prevent this finish. When any such exist, and the recess is of small dimensions, it may b„e raised slightly above the floor of the room. This, however, would be very objection- able, in the case of a large-sized window. The shutters must necessarily be on the inside. These are so constructed, as — parting in the centre of the window, and folding either way — to close into soffits in the side jambs, as indicated by the ground plan beneath. Windows of this description vary considerably in their form. Some are
