104 



Indiana University Studies 



The average load is figured at 40 horse-power per hour with 

 a 10-hour day run for 200 days per year, which would be equal 

 to 80,000 horse-power hours per year. With a yearl}^ power cost 

 of $1,817.75 as shown in the data submitted, the cost per horse- 

 power per hour will be 2.27 cents or 3.04 cents per kilowatt per 

 hour. The yearly cost of SI, 817. 75 can be itemized as follows: 



COST CHARGEABLE TO DEPRECIATION 



Building 



Boiler \ 



Engine / 



Foundations 



Pumps 



Piping 



Stack 



Heater . 



Dynamo 



Smtchboard 



Wiring 



Belting.. 



Shafting 



Total 







Depre- 







Cost 



Age 



ciation 



Depre- 



Condition 







(Per 



ciation 









cent) 







$400 



3 



4 



$16 



New, good. 





J ^ I 







Good. 



$1,800 



10 



180 



Second hand 





1 9/ 







Fair. 



600 



3 



10 



60 



New, good. 



100 



6 



10 



10 



Second hand. 



100 



3 



10 



10 



New, good. 



60 



3 



8 



4.80 



New, good. 



85 



3 



6 



5.10 



New, good. 



265 



3 



6 



15.90 



New, good. 



115 



3 



5 



5.75 



New, good. 



75 



3 



5 



. 3.75 



New, good. 



160 





25 



40 



New, good. 



75 



8 



4 



3 



Second hand. 



$3,835 







$354.30 





TOTAL YEARLY COST 



Cost chargeable to depreciation (as above) $354 . 30 



Interest (5 per cent) 191 .75 



Taxes and insurance (2 per cent) 76 . 70 



Operating charges — 



Labor, one man at $12 per week $500 . 00 



Coal, 400 tons at $1.65 per ton 660.00 



Oil. . 10.00 



Repau-s (none except for belting) 



Waste 25.00 



$1,195.00 



Total all charges $1 , 817 . 75 



The following figures were submitted for the power plant of 

 a small mill in which the only electrical equipment was a direct- 



