

APPARATUS FOR THE ANALYSIS OF CASSES. 



DS 



The proportion of common air, in the foregoing speei- VeI 7 Iktk 

 men of gas, and in all cases when care was taken to exclude 

 it, was too small to deserve being taken into the account, 

 not appearing, by the test of nitrous gas, to exceed 1 per 

 cent. 



The following table exhibits the composition of gas from Composition of, 



various kinds of coal. In the last column, under the term S as flom diffe ; 



. . rent coals, and 



inflammable gas, is comprehended that portion, which is bitumens. 



neither suddenly condensed by oxi muriatic acid gas, nor 



absorbed by potash. A name more descriptive cannot be 



applied to it, because it varies essentially in different cases, 



and the proportion of its components is still matter oP 



doubt, 



TABLE L 



Kind of coal. 



1 No. of 

 I the 

 [product 



100 measures consisted of 



Sulph 

 hid. 



Curb, 

 acid. 



de- 

 fiant. 



lnflam. 





Wigan cannel < 



Wed nesbury, Stafford sh. 1 

 Newcastle on Tyne* ••• < 



Newcastle, Staffordshire < 

 Middleton, near Leeds < 



Black Mine, near Man- 

 chester • • • • • . 



Merthyr, Glamorgansh. 



Native coal tar- 

 Caoutchouc « • < 



5-3 



0. 



4-9 



0- 



2-9 



2*2 



3 



1*4 







3 



1*4 







3 3 



2 



2 



0-5 











1 























13 







4-4 



1-8 

 3*4 

 2*8 

 2-8 

 1-7 

 .27 

 2 



1-4 

 2* 

 1*7 

 2 

 3 

 1 

 1 

 1 

 1 

 



1-7 



1*7 



1-6 



1*5 



r 



o 



6 



4-9 



4-9 















2-7 



















1 











2*5 















































15 



17 



85-4 



98*2 



91-7 



97*2 



91-6 



96-1 



94-3 



90-6 



98-6 



94 



96-9 



98- 



91 



96-9 



97 



98*3 



98*8 



100 

 97-3 

 98-3 

 98-4 

 98-5 

 99 



100 



66 



78'1 



After 



