408 Mr. Richardson on the Composition of Coal. 



Burnt with chronate of lead. 



I. -3022 grm. coal gave... -737 grm. co 2 and -1468 grm. h„o. 

 II. -294 grm. coal gave ... -7205 grm. co 2 and -1434 grm. h 2 o. 

 Expressed in 100 parts. 



I. II. 



Carbon, 67434 67-760 



Hydrogen, 5-394 5-416 



Azote and oxygen,... 12-606 12-258 



Ashes, 14-566 14-566 



100-000 100-000 



The relation of the carbon to the hydrogen in this specimen is as 1-020 : 1-000 or 1 : 1. 

 This differs from the cannel coal from Lancashire, but it agrees with the splint coal from 

 Wylam Banks, near Newcastle. Between the splint and cannel coals there is at all times 

 much similarity, and this is countenanced again by the above results. 



III. Variety. — Cherry Coal. 



1. Specimen from Jarrow, near Newcastle. 



This species of coal occurs more or less in every coal field, often forming thin beds o r 

 layers in the midst of other coals. The specimen submitted to analysis was obtained from 

 a thin seam passed through while sinking the shaft of the mine deeper. Colour is beautiful 

 jet black ; lustre, resinous, splendent ; principal fracture straight, uneven ; cross fracture' 

 conchoidal ; not very hard and easily frangible ; specific gravity, 1-266. 

 Ashes determined as usual. 



I. -2567 grm. coal left as residue, '0045 grm. 

 II. -3457 grm coal left as residue, -0056 grm. 



•6024 0101 



Amounting to 1-676 per cent. 



Burnt with chromate of lead. 



I. -4164 grm. coal gave... 1-2755 grm. cc 2 . and -1895 grm. h 2 o. 



II. -3114 grm. coal gave... -9573 grm. co 2 . and -1414 grm. h 2 o. 

 Expressed in 100 parts. 



I II. 



Carbon, 84-694 84-998 



Hydrogen, 5.054 5-043 



Azote and oxygen, ... 8-476 1676 



Ashes, 1-576 1-676 



100-000 100000 



