716 Examination and Analysis of two specimens ofAva Coal. [No. 7. 



Gaseous, 



Carbon (coke), 

 Ash,* 



I 6 



<j 



30.75* 



67.85 



1.40 



o . 



o "+*> 



28.50 

 69.00 



2.50 



m 

 m 

 O 



30.00 



68.50 



1.50 



Eemarks. 



*with water. 



fa well known coal. 



JMynyddysburgh vein. 



So far then as laboratory research will inform us this is a first 

 rate coal; but I need not remark that the character of all coals 

 depends greatly, especially in India, first upon how they are burned, 

 and again that they are fair averages from the mine ; and indeed 

 with reference to No. II., if it is from near the same locality, that 

 this coal, No. I. be not adulterated by a mixture of it. As to the 

 burning, there can be no doubt that between the effects of climate 

 the negligence of the stokers, and often the little attention paid by 

 the engineers, much of our heating power has been wasted in India. 



No. II. — Infeeioe Jet Coal. 



This is a dull, slaty-looking coal, dividing in the weather-worn 

 specimens into very thin laminae and having on the weathered edges 

 orange-red iron-stains. 



It flames well and does not melt. Its powder does not coke at 

 all like No. I. nor does the coal (as might be expected) shew any 

 signs of coking ; a lump of it in a closed silver crucible giving off 

 its gas very readily but scarcely altering in appearance. 



It contains a small portion of pyrites which are seen to have 

 decomposed on the surface and between the laininse in small spots. 



Its specific gravity is 1.42. 



Its contents in 100 parts are as follows, and I place next to my 



* I have noted above that our coal and Welsh coal are all red-ash coals. The 

 Puntypool ash contains lime, which ours does not. 



