240 



Oue toil of Illinois coal is worth $1.95; 



Olio ton of Alabama coal is worth $2.38; 



Oue ton of Virginia coal is worth $2.55 ; 



One ton of Maryland coal is worth $2.4S. 



This gives a method of flguring the value in dollars and cents of east- 

 ern coals compared with Indiana coal. This table is for average values of 

 many grades of eastern coal, but for only one coal from Indiana. 



For example, if oue ton of this Indiana nut and slack costs $1.G0, the 

 value of one ton of Pennsylvania coal (7.85% ash and 14,321 B. T. U.) is 

 (100x245) /200, or the eastern coal is more economical, if it costs less 

 than 19G cents. 



If Virginia coal is $2.50 per ton, then Indiana coal is more economical 

 if it costs less than (250x200) /255, or 190 cents per ton. 



Summary. 



The nut and slack coal which has been delivered to Indiana Univer- 

 sity from the Summit Mine showed an average ash of 11.64% and an aver- 

 age B. T. U. of 12,707. 



A comparison of this coal with the coal purchased by the United 

 States during the year 1908-9 shows that the Indiana coal is inferior to 

 the coal from Virginia, West Virginia, Pennsylvania, Maryland, Alabama, 

 bnt superior to that from Illinois. 



A method is given for calculating from the P>. T. U. the relative value 

 of Indiana coal compared with eastern coal. 



This article is an attempt to show the real worth of Indiana coal and 

 to make clear the errors due to inaccurate sampling. The buyer of coal 

 should know exactly what he purchases. Eastern coal has been incor- 

 rectly sampled, the same as Indiana coal. Analyses and method of saiu- 

 ])ling given in the Government bulletin are without doubt correct. Analy- 

 ses of Indiana coal from samples incorrectly taken are worthless for use 

 in calculating the comparative values of the coals and should not be given 

 the least weight or consideration by a purchaser of coal. 



It is urged that coal samples for analysis lie taken from cars by 

 some one who understands sam]iliiig. 



The figures given in this ]»a])er for Indiana comI arc not assumed to 

 be average values, since coal from only one mine is ri>presented. The 

 average value of Indiana coal can not be determined without making a 

 series of analyses of proper sam|)les from many Indiana mines. 



IiiilidiKi riiircrsil I/, JSIoDiiiititjtoii. 



