118 



FUEL. 



NOTES. The best quality of charcoal is made from oak, 

 maple, beech, and chestnut. 



Wood will furnish, when properly charred, about 20 per 

 cent, of coal. 



A bushel of coal from hard wood weighs 30 Ibs. 



A bushel of coal from pine weighs 29 Ibs. 

 TABLE, showing the number of parts of charcoal afforded 

 ly 100 parts of different kinds of wood. 



Woods, Parts charcoal. Color. 



Lignum Vitse afforded. 26.8 Grayish. 



Mahogany " 25.4 Brown. 



Laburnum " 24.5 Velvet black. 



Chestnut " 23.2 Glossy black. 



Oak 22.6 Black. 



Black beech 21.4 Fine black. 



1Io ll 19.9 Dull black. 



Sycamore " 19-7 me black. 



Walnut " 20.6 Du back. 



Beech " 19 - 9 Dul1 black. 



jy{ a pl e 19.9 Dull black. 



Norway Pine " 19.2 Shining black. 



E l m 19.2 Fine black. 



Sallow " 18.4 Velvet blac k 



17.9 Shining black. 



17.4 Velvet black. 



Scottish Pine " 16.4 Brownish. 



COKE. 



Sixty bushels ol Newcastle lump coal, will make 92 

 bushels of coke. 



Sixty bushels of Newcastle slack, or fine coal, will make 



85 bushels of coke. 



