Timber and Some of Its DiseasesMacmillan and Company, 1889 - 295 páginas |
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Términos y frases comunes
absorbed Agaricus melleus air-bubbles alburnum annual rings ascent atmosphere attacked autumn wood bark become beech Boehm bordered pits bubbles cambium cambium-cells capillary cause cavities cell-walls closing membranes colour conidia conidium Conifers contains cortex cortical cotyledon course cracks Crown 8vo cut branch cylinder damp destroyed developed Dicotyledons diseased timber dry-rot elements Elfving epidermis experiments exposed fact foresters formed fructification fungi fungus germinate Godlewski growing Hartig heart-wood hypha hyphæ imbibition larch layer leaf leaves less living cells lumina matter medullary ray-cell medullary rays membranes Merulius mycelium numerous occur oogonium osmotic parasites parenchyma pass patch peculiar Peridermium Pini piece pines pith plants points Polyporus pressure protoplasm radial root-pressure roots rotting Sachs seedlings seen soil spores spread spring wood stem stomata structure substance surface thin timber tion tissues tracheides Trametes radiciperda transpiration transverse section tree trunk tube vessels walls weight wood-parenchyma wound young zones zoospores
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Página 224 - ... the outer parts of the wood into a mixture of acid substances resembling the humus of black leaf-mould. Now as the rain soaks into this, it dissolves and carries down into the wood below certain bodies which are poisonous in their action on the living parts of the timber, and a great deal of damage may be caused by this means alone. But this is not all : as soon as the decaying surface of the wound provides these mixtures of decomposed organic matter, it becomes a suitable soil for the development...
Página 38 - ... conditions, and within those limits of variation in structure and function which constitute health. The importance of the subject in connection with the modern development of biology along the grand road of comparative physiology, does not need insisting upon here. It will be the object of further articles to show how it is, if possible, still more important and interesting to know the structure and functions of healthy timber, before the practical man can understand the diseases to which timber...