(Published In 1892.)

Figure i is a general view of the large swimming bath in the house of the Manhattan Athletic Club, New York City. The dimensions of the pool are about 100'x21'x8' deep. Fresh water is periodically supplied through pipe A, being aerated by falling several feet into the pool in a wide sheet at B. Ordinarily, circulation with the heating boiler is maintained through the 6-inch pipes A and D, as indicated by the full arrows. E is the overflow and F is a suction pipe to a filter pump. G is an emptying pipe to the sewer. Figure 2 is a general cross-section of the swimming bath showing its construction. Figure 3 is a partial horizontal section and plan, showing an enlarged view of the supply and circulating connections. Supposing the tank to be full of water it- temperature is maintained or elevated by the steam-coil beater H, hot water from which circulates through pipe D and enters the pool through a grating a. O colder water flowing back to the heater to replace it through the outlet I and the pipe A. Inlet O is at the middle of one side wall 0f the pool about 3 feet above outlet I, which is in the bottom at one end. 50 feet away, so as to insure diffusion of the hottest water throughout the pool, while the circulation through heater H is so easy-chat the water returns to the tank as fast as its temperature is slightly raised, thus never becoming too hot in small quantities. For this circulation, valves K and L are open and more water may or may not be supplied at pleasure from the pump delivery pipe N. When however, it is desired to aerate the water by delivery through cascade B, Fig. 1, valve L and outlet 1 are closed and the pump delivers through pipe M, heater H pipe A and branches J J. Figure 4 is a vertical elevation at Z Z, showing the connections at outlet O, Fig 3 The cascade was designed after the completion of the bath, so the sleeve Q was calked into the outlet elbow F of circulation pipe A. Brass pipes J J were branched from Q, whose top was fitted with a screw plug R.

Fig. 2. BATHS OF THE NEW YORK ATHLETIC CLUB.

Fig . l.

Fig. 5.

Branches J J have two vertical risers T T about 12 feet long, which are connected by an 8-foot horizontal pipe B, which has for nearly its entire length a 1/32-inch wide slot S (or of a total area about equal to the cross-section of the pipe), through which the water escapes, forming the cascade when plug R is screwed in. When R is removed, circulation is directly through the top I, of sleeve Q. A key wrench and guide enable the attendant to insert plug R from the surface of the water.

Fig. 7.

Figure 5 shows the heating tank H and its connections. M is the 3-inch cold-water supply from the roof tank. A and D are circulation pipes to the swimming bath, and with their valves L and K are designated by the same reference letters as in Figs. 1 and 3. B is a 4-inch supply from the city mains. It passes through meter C and has for the pump service a branch E with the connections F to the roof-tank pump N, G to the filter pump, J and I to to the bath pump K. House pump N delivers to the roof tank through pipe M, or to the boilers by O, or to the fire line by P; Q is an equalizing chamber. R, S, and T are branches to the suction and delivery pipes of pumps J and K. U is the emptying pipe of the swimming bath, and V and W are branches for sewer waste and pump suction respectively. X X are live and exhaust steam supplies to the heating coil H, and Y is the return steam pipe with trap Z.

PLUMBING OF A SWIMMING BATH.