225 



least six times as much as would be necessary with up-to-date maehiner.v 

 and methods in large central plants. 



During the last nine months I have visited all the mills and (piarries 

 of Monroe County which are at present in operation, and have taken data 

 on the coal consumption and power produced throughout the district with 

 an idea of showing how great these losses are and at least suggesting a 

 remedy for some of them. 



From tlie data taken I have chosen three plants which are representa- 

 tive of the older type and have averaged them so as to avoid giving oi;t tlie 

 data of any single plant. The data are as follows : 



Amount of coal used per month (tons) iy5 



Cost of coal at the mine at $1.15 per tun ... ..*pl5.5.2o 



Freight on coal at $ . 55 per ton 74.25 



Total cost of fuel 229.50 



Horse-povv'er developed, engine rating 75 



Hours of running time during the month 2-tO 



Coal consumed per horse-power hour (ll)s. ) 15 



I have also taken the data for three of the more modern type of plants 

 and averaged them to show the great improvement already made towai'd 

 greater economy. The data are as follows: 



Amount of coal used per Uiontli (tons) 192 



Cost of coal at the mine at .$1.15 ])er ton .$220.80 



Freight on coal at $ .55 per ton 105 00 



Total cost of fuel per month 826.40 



Horse-power developed, engine rating 200 



Hours of running time during the month 240 



Coal used per horse-power hour (lbs. ) S 



Although these rignres show that a gn-at inipnivcnnent has already 

 been made in power production, they also show that there are still great 

 possibilities tor further reduction in power costs. 



The saving of human labor engaged in the ])rodu(tion of the power ir: 

 central plants over the present methods would amount to two-thirds of the 

 number of men now engaged. 



In my final paper on the subject I hope to carry out the above figures 



15—1019 



