. The street railway review . single, are placed in pairs with the axes in a verticalplane at right angles to the center line of the supply pipe, the axisof each nozzle making an angle of 30 degrees, with a vertical planethrough the center of the supply pipe. The connection of eachnozzle to the supply pipe is by a 3-in. nipple 6 in. long. The effectof each pair of nozzles is to throw a mass of spray to the height ofabout IS ft., which in falling covers an area of 15 x 30 ft The cen-tral pipe of the cooling system, when the additional piping now in-dicated by the dotted lines of the diagram is
. The street railway review . single, are placed in pairs with the axes in a verticalplane at right angles to the center line of the supply pipe, the axisof each nozzle making an angle of 30 degrees, with a vertical planethrough the center of the supply pipe. The connection of eachnozzle to the supply pipe is by a 3-in. nipple 6 in. long. The effectof each pair of nozzles is to throw a mass of spray to the height ofabout IS ft., which in falling covers an area of 15 x 30 ft The cen-tral pipe of the cooling system, when the additional piping now in-dicated by the dotted lines of the diagram is installed, will be pro-vided with an expansion joint. .•\ dike extending nearly across the pond ne->r nf end provides 138 STREET RAILWAY REVIEW. LVoL. XV, No. 3. a canal through which water is conducted to the suction chamber,the object being to draw the supply from distant parts of the pondto give greater time for cooling. The suction chamber is a brickwell, 14 ft. 6 in. square, with an entrance 12 ft. wide fitted with. perature for each day is the average of readings taken at intervalsof three hours. The humidity curves shown were plotted from datafurnished by the United States weather bureau at Chattanooga, thelunnidity for each day being the average of observations made at7 a. m. and at 7 p. m. The new equipment of the station was put in com-plete operation July 3, 1904, since which time the threeturbine units have been in continuous daily operation,supplying all the current required by the ChattanoogaElectric Railway Co. and the lighting of the city, with-out any interruptions whatever. -\^J\- u I I 7 \//^ /z
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