Introduction of systematic treatment to the crown forests of the Cape colony; summary of rules and instructions - Softcover
Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1885 edition. Excerpt: ... The foliage of trees at the edge of a forest is often surmounted by bare dead branches, rising like the horns of a stag from their crowns, whilst trees entirely isolated in exposed hedges, or avenues, frequently present a broken appearance, vulgarly called the " Witches broom." The following signs, on the contrary, are considered symptoms of defects or disease:--1. A flat or swelled appearance on one side of the stem is indicative of an eccentric heart, and consequently of irregular formation of the grain. Bark split in spiral threads denotes the same formation of grain throughout. 2. Bark dull and blotchy, especially if split or channelled, extending deeper than the periodic shedding necessary for the normal conditions of its existence; scales or thin plates showing a tendency in the wood to puff up; large red or white stains breaking the uniformity of the colour; all these indications denote an infiltration of water, or an effusion of sap into the interior. 3. The presence of fungus on the bark; an excessive quantity of lichen or vegetable parasites, generally denote internal decomposition more or less advanced. 4. Holes made by birds usually imply soft wood, and often indicate the presence of highly injurious insects. 5. The presence of eruptions; scarred branches; rotten knots partly grown over and called "bull's-eyes"; holes or cavities containing water on the trunk; the exuding of matter; dust proceeding from small holes between the roots; are all indications of internal decay. 6. Warts, woody protuberances; circular excerscences, whether having twigs growing on them or not; bulging of the bark in the direction of the grain; generally denote defects, decay, or splits inside. The same are to be feared when small...
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