At higher pressures of methane fusinites at the II, III and IV stages of metamorphism adsorb more methane than vitrinites. In the latter, methane sorption capacity is at a minimum at medium ranks. Fusinites of all ranks are curable of much more rapid sorption of methane and carbon dioxide than vitrinites. One may suggest that coal seams including bands or lenses of fusinite are more liable to blowouts than the seams with no such bands. Seams rich in fusinites, apparently, are almost more easily degassed.