Water Lifted By Compressed Air
For Municipal, Manufacturing, Irrigation or Other Water Supply

pressors, and with coal at $2 per ton, other figures being estimated oh a very generous basis, the cost nets about $2.50 per 1,000,000 gallons, or about 2| mills per 1,000 gallons. These figures cover fuel, oil, labor, sinking fund, interest and taxes. In one New Jersey plant, yielding 1,750 gallons per minute, the use of Ingersoll-Sergeant Corliss Air Lift machinery has doubled the quantity of water with only one-half the fuel formerly required by another make of compressor. In many cases the introduction of the Air Lift may be effected at little expense, often involving the purchase only of an air compressor, a receiver, and a small amount of pipe, but the following is estimated on a basis which will cover the greatest amount of expense likely to be incurred, with a view of showing particularly that the interest and depreciation charges under the most extreme conditions are not likely to develop into formidable figures. The following is a list of the com- plete equipment for an Air Lift plant to raise 1,500,000 gallons per 20 hours, or 1,250 gallons per minute. Total lift, 75 feet: Air compressor, complete, ready for foundation and piping. Air receiver. 85 H. P. of boiler, with feed pumps, etc., bricked up and ready for use, including building and value of ground so occupied. Tank, say 19,000 gallons capacity (15 ft. x 14 ft. 6 in.), including suit- able timber framework to bring tank 75 feet above water level. Two 12-inch wells, each 135 feet deep, cased. 450 feet 7f-inch light casing (water discharge pipe). 500 feet of 3-inch. casing (air pipe in wells). 1,000 feet of 4-incli air line from receiver to wells. 1,250 feet of 12, 10 and 8-inch cast iron distributing main, leaded joints, from tank to works, laid below frost (air line laid in same trench). All other pipe and fittings. Compressor, receiver and tank foundations, say 18,000 brick, laid in cement. Excavation for foundation, say 75 cubic yards. Special automatic governing mechanism. Total estimated cost of complete plant, ready to run, as above $8,750.00. This is intended to include everything which may be considered as a legitimate expense in this connection. In many cases the build- ings, boilers, tanks, wells, pipe lines, ground space, and other items do not represent a present expense, being already on the ground. From the figures on the opposite page we may estimate the cost of operation, as follows : 26