231 



steam plant : 



2 engines totalinn' 1000 H. 1* $25,000 



Necessary auxiliaries at $8.50 per H. P 8.500 



4 flre-tiibe boilers, 200 II. P 5.700 



2 400 K. W. generators, 550 volts 9,628 



2 16 K. W. exciters, direct current 810 



Switchboard equipment, $4.25 per K. W 3,400 



Cost of stack at $3.00 per H. P 3,000 



Foundations for engines and boilers 3,000 



Piping and installation 2,000 



Total cost of i:>lant without buildings $63,038 



If turl lines were used with three 250 H. P. water-tube boilers and super- 

 heaters instead of the above equipment, the total cost would be $57,150. 



The fixed charges against the steam plant would l»e as follows: 



Interest at 5 per cent, on whole investment $3,152 



Taxes and insurance at 2 per cent 1,251 



Depreciation at 10 per cent 6,30f4 



Tottil fixed charges $10,717 



Operating chax'ges for one year : 



Labor $3,900 



Coal at $1 70 per ton, 5,000 tons 8,500 



Repairs, 1 per cent, of first cost 630 



Oil. waste, etc 1,650 



Total operating cost $14,680 



Total cost of power for the year 25,397 



Price per K. W. hour, calculating on a 10-hour run, 308 days, 1.1 cts. 

 The same calculations on a producer-gas plant of the same size offer a 

 comparison which is well worth studying. 



