Silica 27.26
Alumina 26.48
Oxide of iron 12.98
Lime 20.19
Magnesia 3.42
Sulphuric acid 9.47
Alkalies and loss 0.20
------
100.00
From these figures the composition of the coal itself calculates as
under--
Water 20.09
Carbon 53.58
Hydrogen 4.23
Oxygen 16.23
Nitrogen 0.80
Sulphur 0.36
Silica 1.29
Alumina 1.25
Oxide of iron 0.61
Lime 0.95
Magnesia 0.16
Sulphuric acid 0.44
Alkalies 0.01
------
100.00
One ton furnished 8,458 cubic feet of gas and 8 cwt. of coke.
The very high proportion of water contained in the sample is very
remarkable. It was so loosely combined, that even at ordinary
temperature it gradually escaped, the coal crumbling to small pieces.
The large amount as well as the high percentage of oxygen characterize
the so called coal as a _lignite_, with which conclusion the physical
characters of the sample are in perfect harmony.
The resin to which I have referred has not been further analyzed. It was
found to be insoluble in all ordinary menstrua, such as alcohol, ether,
carbon disulphide, benzene, or chloroform, and neither attacked by
boiling alcoholic potash nor by fusing alkali. On heating it swells up
considerably and undergoes decomposition, but does not fuse.
The coal may be valuable as a gas coal and for local consumption, but
the large proportions of water and of oxygen militate against its use as
a steam producer, only 58 per cent. of it being really combustible.
* * * * *