This section is from the book "A Treatise On Architecture And Building Construction Vol2: Masonry. Carpentry. Joinery", by The Colliery Engineer Co. Also available from Amazon: A Treatise On Architecture And Building Construction.
108. Though the location of the fixtures and the arrangement of the pipes in the bathroom are usually considered only in connection with the plumbers' work, the finish of these details and the general interior treatment of the rooms are entirely in the hands of the joiner.
Fig. 67 (a) shows the front elevation of the enclosure around the water-closet seat, when such an enclosure is required by the character of the plumbing. The paneled front abcd is framed of 7/8-inch stock, and enclosed at the top and ends by the casing e ab cdf, on the back of which are provided the stops, shown at g' in the section (c), to prevent the panel front from falling inwards, while the two thumb buttons h, Fig. 67 (a), hold it securely in place, but at the same time permit of the front being readily removed to examine the plumbing fixtures.
On top of this front framework is the seat and its cover, or lid, each of which is hinged, so that it may be raised when necessary. This is accomplished as shown in the plan (b), where a" b" c" d" is the outside framework covering the entire top of the water closet and extending the full width of the enclosure, which is usually 2 feet 4 1/2 inches, as shown. This framework consists of three side pieces e", f", and g", and is screwed to the back cleat, shown at k' in (c) and to the front panel frame j. Within the opening of this frame is fitted the seat ad bc, framed of four pieces, as shown at (d), the front and back pieces a and b being mortised on their inner edges to receive the tenons and relishes of the side pieces c and d as shown by the dotted lines. The opening in the seat is formed at the back with a semicircle 7 inches in diameter, and at the front with a semiellipse whose semimajor and semi-minor axes are 6 1/2 inches and 3 1/2 inches, respectively, making the opening 7 in. X 10 in., as shown at (b). This opening is splayed out on top and rounded over to the line of a circle kk whose diameter is 11 inches. The seat is hinged at its back to the back of the framework a" b" c" d", as shown at h in Fig. 67 (c). The lid or cover is then made 1 inch wider, but 1 1/2 inches less in depth than the seat, and is fitted over it and hinged to cleats on the top of the framework, as shown. The lid is framed in the same manner as the seat shown at (d), but with the opening omitted and with a flush panel inserted in the center; or it may be a plain board with clamps on the end, as described in Art. 19.
109. Washtubs are fixtures which the joiner is frequently called upon to build, and Fig. 68 shows a method of constructing them. At (a) is shown a plan of one of these tubs, at (b) a vertical section through the tub, and at (c) the plan of the cross-piece under the tub, and its joint with the turned leg, as seen at x in the vertical section. These fixed tubs are usually built either in a kitchen or laundry, and consist of from two to four divisions. At (a) is shown the end tub of a set. The partition a and end-piece b are seen housed into the front and back pieces c and d. These pieces a, b, c, and d are all 2 inches thick, and are bedded at the joints with white lead. The bottom is dadoed into the sides and secured by means of lagscrews, shown at e in Fig. 68 (b), and this joint is also set in white lead. At y y' is seen a paneled cover over the tubs, hinged with a brass hinge at y', while behind the tubs is shown a 2-inch space for pipes, etc. Extending over three-fourths of the thickness of the back piece d' 'is a wooden cap f, which finishes the top against the wall. At g is shown a 2"x2 1/2" support against the wall, carrying, one end of the 1 1/2"x2 1/2" beam h, the other end of the beam resting on and dovetailed into the 4-inch leg k, as shown in the plan (c) at k'.