Abstract
Wood and man have coexisted on this planet from the beginning, and wood, as a renewable resource, has provided man with tools, weapons, and shelter. During the millennium of man's development, he learned how to make it harder and stronger. This modification was accomplished by drying and heat tempering his wooden tools and weapons. As man increased his knowledge of the world he lived in, he attempted other modifications of the basic resource to better fit his increased requirements. Over the years, tars, pitches, creosote, resins, and salts have been used to coat wood or fill its porous structure.

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