240 



Oue ton of Illinois coal is worth $1.95; 



One ton of Alabama coal is worth $2.38 ; 



One ton of A'irgiuia coal is worth $2.55; 



One ton of Maryland coal is worth $2.48. 



This gives a method of figuring 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 one ton of this Indiana nut and slack costs $1.G0, the 

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

 (lG0x245) ,/200, or the eastern coal is more economical, if it costs less 

 than 190 cents. 



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

 if it costs less than (2.10 x 200) /2.55, or 190 cents per ton. 



SlMMARY. 



The nut and slack coal which has l)i'en delivered to Indiana Univer- 

 sity from the Sunnnit Mine showed an average ash of 11.04% and an aver- 

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



A compari.son of this coal with the coal ]iurchased liy the United 

 States during the year P.)OS-l> shows tliat the Indiana coal is inferior to 

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

 but superior to that from Illinois. 



A method is given for calculating from the V>. T. TT. the relative value 

 of Indiana coal compared witli eastern coal. 



This article is an attemi)t to show the real worth of Indiana coal and 

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

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

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

 l)ling given in the Government bulletin ar<> 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 he taken from cars by 

 some one who understands sampling. 



The figures given in this paper for Indiana coal are not assumed to 

 he average values, since coal from f)nly one mine is represented. The 

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

 series of analyses of proper samples from many Indiana mines. 



Indiana nnirers-ifti, Bloo)))inf/lfHi. 



