Heartwood extractives of Cryptomeria japonica

Abstract

Wood has always bean one of the moat useful materials available to mankind. While still growing it provided man with shelter and protection both from stormy weather and from the sun's heat. When dead, the wood supplied fuel for cooking and warmth. Nowadays wood is so important for building purposes, pulp and paper manufacture, and the manufacture of various wood products that it is extensively grown in man made forests throughout the world. These "tree farms" are scientifically controlled and this type of agriculture is now taken for granted. Wood extracts have been used for a long time past. They were first used in a primitive manner as dyestuffs and drugs, and many further uses have since been found for these extracts.