. Electric railway journal . bove the floor of one of the basement subdi-visions. The exhaust steam connections are practicallystraight and vertical from the outlets under the turbine casingsto the top of the condensers. Daylight is admitted to each ofthe condenser pits through a hatchway extending from themachine room floor down through the basement and throughthe basement floor, which forms the ceiling of the condenserrooms. Each of these hatchways is made of No. 12 plate rein-forced with angles. All three of the condenser pits drain to acommon sump, which is emptied by a 3-in. Lunkenheimers
. Electric railway journal . bove the floor of one of the basement subdi-visions. The exhaust steam connections are practicallystraight and vertical from the outlets under the turbine casingsto the top of the condensers. Daylight is admitted to each ofthe condenser pits through a hatchway extending from themachine room floor down through the basement and throughthe basement floor, which forms the ceiling of the condenserrooms. Each of these hatchways is made of No. 12 plate rein-forced with angles. All three of the condenser pits drain to acommon sump, which is emptied by a 3-in. Lunkenheimersteam ejector. The hot-well pumps are located in the con-denser pits close to the condenser foundations. These pumpsare of the Boytts-Porter type, with cylinders 20 x 20 x 48 in. VACUUM SYSTEM The dry-vacuum pumps are installed under the switchboardgallery in a bay on the machine room floor. Each vacuum pumpis made up of a 16 x 42-in. Hamilton-Corliss 50 engine, towhich a crank, connecting rod and a Laidlaw-Dunn-Gordon. Cincinnati Turbine Station—Electrolytic Arresters onOut-Going Feeders vacuum cylinder 36 x 60 in. have been added. The vacuum cyl-inders have semi-rotative valves operated similarly to the Cor-liss exhaust valves. For removing the air from the intake line and elevating thewater from the river to prime the centrifugal pumps, a con-nection is made from the circulating system to the valve cham-ber on each end of the vacuum pumps. When the piston has April 30, 1910.] reached the end of its stroke the rotative valve closes the open-ing on the suction side and establishes communication with thedischarge side; then air is drawn into the cylinder from thecirculating system. That is to say, after the pump has ex-hausted the air from the condenser it then exhausts the airfrom the circulating system, and does this without reducing thevolumetric capacity of the pump for removing air from thecondenser. The scheme of performing two services with thevacuum pump, howeve
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