2G8 Dr Pyfe on the Evaporative Power of Coal. 



Volatile matter, 7.37 



Fixed Carbon, 79.15 



Ashes, . . 13.25 



A much more minute analysis of anthracite from Wales is 

 given by Dr Schafhaeutl, in a report submitted to the Anthra- 

 cite Patent Company. The following is the composition of two 

 samples: — 



Moisture, . 00.00 0.300 



Carbon, . 92.42 94.100 



Hydrogen, . 3.37 1 Vol. 2.390 \ Vol. 



Oxygen, . 1.43 f matter, 1.330 \ matter, 



Nitrogen, . 1.05( 5.97 O.JS74 J 4.0 



Sulphur, . 0.12) trace 



Ashes, . 1.61 0.932 



100.00 99.932 



Loss, .008 



100.000 



In these specimens, the quantity of volatile matter varies 

 from 4.31 to 9.6. It may be stated to be on an average about 

 5 per cent. The greatest amount of carbon is 94.1. It is ge- 

 nerally allowed, that anthracite contains on an average about 

 92 per cent. 



The coal with which my trials were made was much mixed, 

 some parts being of good quality, others containing an ad- 

 mixture of impure coal, having a good deal of iron-pyrites and 

 of earthy matter. In its composition it resembled the speci- 

 mens analysed by Berthier. Its specific gravity varied from 

 1303.5 to 1406.6. To procure an average sample for analy- 

 sis, a considerable quantity was taken from the heap at ran- 

 dom, which was bruised, and from this a smaller quantity was 

 removed and then reduced to powder. This, on analysis, 

 yielded 



Moisture, . . 4.5 



Volatile matter, 13.3 



Fixed Carbon, 71-4 



Ashes, . 10.0 



100.0 

 Anthracite of good quality burns with very little or no 

 flame, and without smoke. When first thrown on the fire it 

 decrepitates, and small pieces are thrown off from it, which 



