50 



lated to the Cannel Coal by the present analysis, only 

 instead of being somewhat slaty and very compact, it 

 has an external resemblance to Newcastle Coal, which^ 

 however, always produces a more perfect cinder irregularly 

 formed, while this in the process divides into rhombic 

 shapes, splitting and curving into branch-like appearances 

 as a cinder, and becoming sometimes blunter and varied- 

 gated, passing totally into the shaley ash, outwardly re* 

 sembling wood ash, and like that very light, as it is 

 extremely pulverulent. I should consider this, nearly as 

 Mr. Mushet's Derbyshire Cannel Coal, to contain 



Volatile matter 47 



Carbon 48 



Ashes 4 



Loss 1 



100 



Great varieties of Coal may be found in the same bed, 

 consequently differing in analysis, some containing Sul- 

 phur, more or less Earthy Matter, Iron, &c. 



