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The beauty of a knotty oak tree is different from that of a lovely flower. It is the rough beauty of an old soldier's face showing the traces of wind and sun, of harm and of victory, bearing the scars of bygone battles. It is different from the fragile, delicate beauty of a young girl which is evident to anyone at first sight. The beauty of an old and crippled tree is hidden unless perceived by the alert eye which is able to fancy or rather discern the hard trials of life the tree has ex- perienced. Contemplating trees in this way is not much different from busying oneself with physiognomies,...

Here are two physicists looking over the fence of physics, getting thrilled by the life and growth of trees, taking an altogether different, exciting view of wood: trees produce wood for their own benefit. They do not live for the benefit of man who builds his world using wood as a raw material. Timber is revealed in a different light, and the reader is taught to stop thinking of it in terms of defective beams and boards. Wood only fails as a part of the living tree. To us, the tree and wood biologists, this new definition is a real, inspiring challenge, which is just what Kubler and Mattheck...

Interest in trees, whether in our streets, parks or forests, has in creasedconsiderablyin thelast 20 years or so.One reason for this has been the decline and dying of forests, which caused great concern about our environment during the 1980s. Because ofthe prominenceofthis event, which is nowblamedon abiotic factors, it is all too easyto forget that the life oftrees is also affected by a multitude of biotic factors: viruses, bacteria, fungi and animals. These may have very different relationships with trees, but are usually deleterious. The fungi playa particularlyimportant part, and during...

Wood-destroying fungi play an important role in nature, because they are the only forms of life capable of reducing wood to its initial constituents. However, they can also be dangerous for people and property, as they can impair the stability and fracture-safety of trees. This book gives detailed information, based on new and original scientific findings, on the examination and effects of the most important species of fungi associated with failure of infected urban trees. In addition, new ways are presented for predicting the advance of decay in the living tree. The subject is illustrated...