54 



Water Water 



Chemically Median icn I ly 



Combined. Held. Ash. Calories. 



Anthracite coal 2 3 2 8305 



Charcoal, air dry 12 3 6868 



Charcoal, kiln dry 3 7837 



Wood, air dry 39 20 1 3232 



Wood, kiln dry 49 1 4040 



Peat ' 26 25 5 3950 



Peat, manufactured 30 18 2 4430 



Hvaijorative 



B. T. U. Effect. 



Coal, anthracite 14833 14.98 



Coal, bituminous 14796 14.95 



Coal, lignite, dry 10150 10.25 



Peat, kiln dry 10150 10.25 



Peat, air dry 7650 7.73 



Wood, kiln dry 8020 8. 10 



Wood, air dry 6385 6.45 



From these tables it will be seen that unprepared peat has a higher 

 heating value than wood, but is inferior to coal. 



COMPARISON OF INDIANA BITI'MINOUS COALS AND INDIANA 



PEATS. 



I. Chemical Composition : 



(A) The extreme percentages of the constituents considered in connec- 

 tion with the fuel value of twenty samples of Indiana coal, analyzed by 

 Dr. W. A. Noyes* : 



Volatile 

 Moisture Comhxistihle Fired 



105°. Matter. Carbon. Coke. Ash. Sulphur. 



Maximum 13.82 45.16 52.77 57.22 9.76 4.01 



Minimum 6.08 35.22 41.80 49.62 1.06 0.34 



(P>) Similar data from the analyses of Indiana peats (air dried) : 



Maximum 17.16 61.98 24.30 37.55 13.82 1.33 



Minimum 8.99 52.23 19.08 26.67 4.14 0.74 



♦Report of State Geologist, 21, p. 105. 



