the building, is baled and then disposed of. The 

 paper is sent down into this room through a chute. 



In the pump room is placed the feed-water heater 

 above mentioned; a 20-ton compression system re- 

 frigerating plant, and the six principal pumps, of 

 Worthington make. Two of these are installed for 

 the fire service, two for the low-pressure and two for 

 the high-pressure house services. For the details of 

 these services the reader is referred to the chapter on 

 Plumbing. 



The fire pumps are of the horizontal duplex, direct 

 acting steam type, each having a capacity of not less 

 than 500 gallons per minute against a pressure of 300 

 pounds, when operating at a piston speed not exceed- 

 ing 100 feet per minute. 



The low-pressure house pumps are of the com- 

 pound direct acting, duplex steam type, of 200 gallons 

 capacity per minute against 100 pounds pressure, 66 

 feet piston speed; the high-pressure pumps are of 

 similar type of 120 gallons capacity against 300 

 pounds 50 feet piston speed. They are brass fitted 

 throughout and their cylinders lagged in the 

 customary manner. 



The pump room further contains the "low- 

 tension" motor generators, for furnishing current to 

 bells, phonographs and similar services, which are 

 usually run by batteries in smaller plants; also the 

 "low-tension" switch board. This service is more 

 fully described in another chapter. 



The office of the Chief Engineer, Mr. J. C. Buxton, 

 is a commodious room, 14 x 20 ft., completely equipped 

 with bookcases and draughting tables; a telephone 

 central station connecting with all parts of the me- 

 chanical and elevator plant; pressure and recording 

 gauges; controlling valves of the Foster Automatic 

 Valve System for emergency purposes, and the electri- 

 cal position indicator board of the elevator service. 



The entrance door to the entire mechanical plant 

 is under the control of the chief engineer's office, which 

 must be passed by all visitors to the engine room. 



The space at the rear of the main switch board 

 was utilized for the New York Telephone Company's 

 board, and for the pump, pressure and discharge 

 tanks of the Otis Company's hydraulic sidewalk lifts. 



Adjoining the engine room on the northeast is 

 located the compressor room. Here are two Inger- 

 soll-Rand 8-in., 13-in., 12-in., and 7J-in., x 10-in. 

 compound steam and air Imperial "Type Ten" Air 

 Compressors, with 45-inch fly-wheels, having a capa- 

 city of 210 cubic feet of free air per minute, at 160 

 revolutions and developing 37 indicated II. P. 



A compressed air system has been installed, consist- 

 ing substantially of a 30-inch by 72-inch tank and a 2- 



[ 83 



inch air main extending to the boiler room, with out- 

 lets and hose for cleaning the boilers; further, of a 

 header in the engine room, with outlets at each 

 generator, and of branches to the several banks of 

 elevators, elevator motors, ventilating fans and cir- 

 culating pumps, all for cleaning purposes. 



The compressor room also contains the machines 

 and separators of the Vacuum Cleaner System, more 

 fully described under that heading; the hot-water 

 service heaters; some parts of the refrigerating plant; 

 the ice- water circulating pumps; the automatic oiling 

 system and various minor fixtures. 



A description of the ice- and hot-water services 

 will be found under Plumbing. 



Above the compressor room is located the filter 

 and tank room, readily reached from the engine room 

 by means of an iron stairway. Here are placed the 

 Scaife water filters and the suction tanks, into which 

 all the water is delivered from the street mains and 

 thence pumped to the various parts of the building. 



All high-pressure steam piping is of extra 

 heavy wrought iron; changes in directions and con- 

 nections to engines and pumps are made with long 

 sweep pipe bends having welded flanges. 



All fittings 2J-inch and over are flanged and all 

 designed for 250 pounds working pressure, although 

 160 pounds is the pressure now carried. The work is 

 thoroughly covered with 85 per cent, carbonate of 

 magnesia throughout, three thicknesses being used on 

 practically all of the high-pressure piping. 



All high-pressure steam piping is drained by 

 means of the Holly Return System and protected by 

 the Foster Automatic non-return combination valves. 



Insulated ceilings are erected over the boiler and 

 engine rooms, concealing, in the latter, a good many 

 of the minor conduits and pipes, but leaving them 

 accessible through manholes and similar openings. 



The toilet, shower-bath and locker accommoda- 

 tions for both the boiler and engine rooms are in keep- 

 ing with the high character of all the appointments. 



The floors of the engine room and adjoining 

 rooms are finished in red tile throughout. The 

 trench covers have been inlaid with the same material. 

 The walls, including those of the boiler room, are 

 lined with white enameled brick and tile. This treat- 

 ment, in combination with the polished brasswork and 

 the dark green finish of the engines, generators and 

 other fixtures, has resulted in a very agreeable effect. 



In a word, everything has been done to give the 

 mechanical plant a setting commensurate with its 

 importance and the large part which it is called upon 

 to play in the successful maintenance of the building 

 and the comfort and convenience of its occupants. 



