Abstract
The various theories, in regard to the formation of coal, i.e.H.Potoniés theory, F.Fischers' lignin origin theory, F.Bergius' and R.V.Wheelers' cellulose orign theory, J.Marcussons oxycellulose orign theory, etc., were introduced, and the important ones of these theories were explained in detail.The artificial coa-lification Method, which were commenced by BergiUs and on which his cellulose origin theory was based, was also explained in detail.
Then the authors coalified cellulose, lignin, fatty acids, oxycarbonic acids, alco-hols, phenols, aromatic acids, carbohydrates, phenol resins, etc.in neutral, acidic and basic water medium artificially.The elementary and technical analysis, extrac-tion tests and carbonisation tests in crucible of the products were carried out From the experimental results the authers concluded that both cellulose and lignin were concerned with the formation of coal, the caking component of coal was derived from cellulose and the moderate remaining of the decomposition products of cellulose and coalification grade were necessary to the formation of strong coaking coal.
