348 Analysis of Indian^ Chinese^ and New Holland Coals, 



analysis of English coke (No. 2), much exceed what should 

 have been expected from the composition of the coal whence it 

 was formed ; this may be explained by supposing that portions 

 of the ashes, probably the alkaline salts, are volatilized along 

 with the gaseous matter, when suddenly decomposed at a high 

 temperature ; or that considerable variation exists in the quality 

 of the material charged in the oven. Whatever may be the 

 cause, the same deterioration might be looked for in the coking 

 of Indian coal, which would tend to lower them still more in 

 scale of comparison. 



TABLE of Indian and other Coals analyzed at the Calcutta. Assay 



Office. 



♦ The coals above enumerated as anthracites are evidently bituminous coals.— Edit. 



1 



