410 Mr. Richardson on the Composition of Coal. 



Which equals 1-393 per cent. 

 Burnt with chromate of lead, — 



I. -2977 grm. coal gave •9454 grm. co 2 and -1383 grm. h 2 

 II. -3149 grm. coal gave 1-0035 grm. co 2 and -1509 grm. h 2 

 Or in 100 parts. 



I. II- 



Carbon, 87-809 88-095 



Hydrogen, 5-159 5-320 



Azote and oxygen,... 5-639 5 192 



Ashes, 1393 1-393 



100-000 100-000 



The carbon is related to the hydrogen in this specimen as 1-377 : 1000 or 4 : 3. 



2. Specimen from South Hetton. 

 This coal occurs in the county of Durham, and is worked through the Magnesian Lime- 

 stone. It is regarded as one of the best. Its character perfectly corresponds with those of 

 the preceding specimen. Specific gravity is 1-274. 

 Determination of the ashes. 



I. -2400 grm. coal left as residue -0060 grm. 

 II. -2604 grm. coal left as residue -0066 grm. 



•5004 -0126 



which amounts to 2-519 per cent. 

 Burnt with chromate of lead. 



I. -2929 grm. coal gave -8855 grm. co 2 . and -1358 h 2 o. 

 II. -2705 grm. coal gave '8116 grm. co 2 . and -1265 h 2 o. 

 Expressed in 100 parts. 



I. II. 



Carbon, 83-588 82-960 



Hydrogen, 5-150 5-193 



Azote and oxygen,... 8-743 9-328 



Ashes, 2-591 2-519 



100-000 100-000 



The relation here is the same as in the former, viz. — 1-315 c. : 1-000 h. or 4 : 3. 

 For the sake of convenience and comparison, the following table contains the mean of the 

 various analyses of each specimen. 



