What we do need is a knowledge of coal's elemental analysis. In other words, we need to know only how much carbon, hydrogen, sulfur, oxygen and nitrogen there is in a given coal. A typical elemental analysis of a bituminous coal is as follows: 82% carbon, 5% hydrogen, 1% nitrogen, 3% sulfur, 9% oxygen.
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1 WxWidgets (http://www.wxwindows.org/) - a widget toolkit for creating graphical user interfaces (GUIs) for cross-platform applications on Win32, Mac OS X, GTK+, X11, Motif, WinCE, and more using one codebase. 2  It can be used from languages such as C++, Python, Perl, and C#/.NET.