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

Cost of Operation. Engineer, double shift, at $2.25 per day, $4.50 ; | time charge- able to pumping plant, per day......................'...... $0.90 Fireman, double shift, at $1.75 per day, $3.50, on the basis of one man required for each 250 H. P. of boiler for 85 II. P. Per day..................................................... 1.19 Fuel, 85 H. P., 20 hours, say tons, at $2 per ton, per day. 8.50 Oil, waste, and sundries, say................................... .60 Interest on investment of $8,750 at 5 per cent., figuring eleven 25-day months, or 275 working days per year, per day. .. 1.91 Deterioration, covering sinking fund, repairs, etc., providing for renewal of complete plant every ten years same basis as interest but 10 per cent., per day....................... 3.18 Insurance and taxes at 1 per cent., as above, per day...... .32 Total estimate cost of pumping 1,500,000 gallons per day, 75 feet high, under the above conditions..................... $16.60 Cost of each 1,000 gallons ($16.60 4- 1500), $0.01107. Kent, quoting the National Meter Company as authority, gives the cost of water in the States as follows: Average minimum price per 1,000 gallons in 163 places, .094. Average maximum price per 1,000 gallons in 163 places, .28. With extremes ranging from 2|c. to $1 per 1,000 gallons. As a usual thing the water rate in most manufacturing cities in the Central States runs in the neighborhood of 8c. to 10c. per 1,000 gal- lons supplied. In some of the larger Eastern cities it runs up to 124c., and even higher, and in some cities of the second and third class goes as low as 5c. per 1,000 gallons. At 5c. per 1,000 gallons the yearly water bill on the above basis amounts to........$10,625.00 And at the figures given above, $0.01107................ 4,566.37 A yearly saving on the above basis of.................. $6,058.63 Salving Effected. This equals a profit of 69| per cent, on the estimated investment of $8,750.00, or is the same as a dividend of 20 per cent, on an invest- ment of $30,293.15. With the actual cost of the plant less than is figured above, as it would really be in the majority of cases, the saving would be still greater. In many cases the operation of the plant does not involve the extra expense of engineer and fireman, and these items may be deducted. In other instances the fuel cost, either through the use of high duty air compressors or through lower cost of 27