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Chemical Analysis^ &fc, 357 



ART. XVI.^CHEMICAL ANALYSIS OF THREE VARIETIES 

 OF BITUMINOUS COAL, AND ONE OF ANTHRACITE. 

 By C. T. Jackson, M. D. 



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December 6th, 1835. The bituminous specimens 

 were analyzed in the order of the numbers. Their locali- 

 ties were at the time, to rae unknown. They are now 

 added. All the spechnens belong to the species called 

 by Werner black coal, and are distinct varieties of that 

 soecies, differino^ in'comDositlon. 



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ORREL COAL. 



r 



No. 1, is a black, shining kind of coal, having a strati- 

 fied appearance caused by layers of mineral charcoal, or 

 the remains of charred vegetable fibre. It breaks into 

 irregular pieces of a bright and glossy appearance. 



There are a few particles of foliated iron pyrites, or 

 bi-sulphuret of iron, between the joints; but in such 

 minute quantities as not to affect its value. 



The streak made by this coal on wedgewood ware is 

 brown. It bums with a large, yellow flame, and leaves a 

 light porous coke of small bulk. Specific gravity = 1 .279. 



burning 



and 



latter purpose care should be used in selecting it firee 

 firom the sulphuret of iron. , 



grams ox this coal y 



Coke 



64.7 



of bitumen and coal gas 35.3 



100.0 



