54 



IVater YVafer 



Chemically Mechanicitlty 



Combined. Held. A.sh. 



Anthracite coal 2 3 2 



Charcoal, air dry 12 3 



Charcoal, kiln dry 3 



Wood, air dry , 39 20 1 



Wood, kiln dry 49 1 



Peat ' 26 25 5 



Peat, manufactured 30 18 2 



B. T. U. 



Coal, anthracite 14833 



Coal, bituminous 14796 



Coal, lignite, dry 10150 



Peat, kiln dry 10150 



Peat, air dry 7650 



Wood, kiln dry 8020 



Wood, air dry 6385 



Calories. 

 8305 

 6868 

 7837 

 3232 

 4040 

 3950 

 4430 



Evaporative 

 Effect. 



14.98 



14.95 



10.25 



10.25 



7.73 



8.10 



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 RITI^AIINOFS 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 Combustible Fixed 



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



Maximum 13.82 45.16 52.77 57.22 9.76 4.01 



Mininmm 6.08 35.22 41. SO 49.62 1.06 0.34 



(B) 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. 



