225 



least six times as mucli as would be necessary with up-to-date machinery 

 and methods in large central plants. 



During the last nine months I have visited all the mills and quarries 

 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 the data taken I have chosen three plants which are representa- 

 tive of the older type and have averaged them so as to avoid giving out the 

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



Amount of coal used per month (tons) IH^ 



Cost of coal at the mine at $1.1.5 per ton $1.5.5.25 



Freight on coal at $.55 per ton 74.25 



Total cost of fuel 229.50 



Horse-pov/er developed, engine rating 75 



Hours of running time during the mouth 240 



Coal consumed per horse-power hour (lbs.) 15 



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

 and averaged them to show the great improvement already made toward 

 greater economy. The data are as follows : 



Amount of coal used per month (tons) 192 



Cost of coal at the mine at $1.15 per ton .$220.80 



Freight on coal at $ .55 per ton 105 60 



Total cost of fuel per month 326.40 



Horse-power developed, engine rating 200 



Hours of running time during the month 240 



Coal used per horse-power hour (lbs.) 8 



Althougli these ligures show tliat a great improvement has already 

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

 possibilities for further reduction in power costs. 



The saving of hu)nan labor engaged in the ]iroduction of the power \n 

 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 



