406 Mr. Richardson on the Composition of Coal. 



Burnt in the usual way with oxide of copper. 



I. -270 grrn. coal, gave -732 grm. co 2 . and -152 grm. h 2 o. 



II. -252 grm. coal, gave -678 grrn. co 2 . and -1385 grm. h 2 o. 

 Burnt with chromate of lead, in the manner already described. 



III. -3414 grm. coal, gave -927 grm. co 2 . and T922 grm. h 2 o. 



IV. -2953 grm. coal, gave 1-0703 grm. co 2 and -2176 grm. h 2 o. 

 These results give, in 100 parts, when calculated, as follows : — 



I. II. III. IV. 



Carbon, 74-961 74381 75071 74-878 



Hydrogen, 6-254 6-111 6-243 6-114 



Azote and oxygen, ... 4-873 5-596 4-774 5-096 



Ashes, 13-912 13-912 13 912 13-912 



100-000 100-000 100-000 100-000 



The relation of the carbon and hydrogen, in this specimen, is clearly as 1 : 1. 



2. Specimen from Glasgow. 



The splint coal ocurs associated with cherry coal in the Glasgow coal-field. The fifth 

 bed is almost constituted entirely of this species. It is very highly esteemed for manufac- 

 turing and household purposes. 



Colour is black, with a little brown. Lustre glimmering. Difficulty frangible. Frac- 

 ture uneven and splintery. Specific gravity 1-307. 



Ashes determined in the usual way gave 



I. -214 grm. coal left as residue -0024 grm. ashes. 



II. -238 grm. coal left as residue -0027 grm. ashes. 



■452 -0051 



which amounts to 1-128 per cent. 



Burnt with cromate of lead in the manner described. 



I. -2798 grm. coal gave -838 grm. co 2 . and -1401 grm. h 2 o. 



II. -2596 grm. coal gave -7818 grm. co 2 . and -1272 grm. h 2 o. 



III. '2378 grm. coal gave -7115 grm. co 2 . and -1171 grm. h 2 o. 

 These results give, in 100 parts, when calculated as follows : — 



I. II. III. 



Carbon, 82-813 83-230 82-730 



Hydrogen, 5-562 5-442 5-569 



Azote and oxygen 10-497 10-200 10-673 



Ashes, 1-128 4-128 1-128 



100000 100-000 100-000 



The relation of the carbon to the hydrogen in this specimen was 1-231 : 1-000 or 5 : 4 



