Geology and Natural History. 221 
No. 11. Block Coal, Sand Creek, Ind.—Analyst, Prof. E. T. 
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excluding the percentage of moisture. Thus the analysis (No. 11 
. . 8 
the table, I have reduced these results to the basis of a full analy- 
sis, including the moisture. The justice of including the moisture 
of the coal in calculations of its calorific power wou unques- 
elemen 
It varies in amount, according to the local conditions affecting the 
oisture is always 
¢ 
per cent of moisture. Now this moisture 1s 4 ater detriment 
equal amount of ash, 
while the ash does not. 
table the pean 
of moisture, as a basis for calorific calculations, though 1n several 
Since the water requires to be evaporated, 
ot 
. 
