This directory reflect a consolidated effort by U.S. industry and the U.S. Department of Energy (DOE) to list and index readily available current export sources for U.S. coal and coal related technologies. This effort is a direct result of industry suggestion from a series of government/industry public meetings on international coal and technology t…
Early microscopic examination of coals and coal macerals began with the use of transmitted and then reflected light microscopy. These methods were limited by the resolution and optical quality of the microscopes used. Improved microscope technology and the development of oil immersion techniques led to advancements in coal petrology. Introduction of…