This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1816 Excerpt: ...will be thrown upon the injured part, and inflammation with its consequences follow. o Hence it will not be difficult to understand, how the canker appears on the young and tender shoots, while the trunk and larger branches are free; because, from age and exposure to the weather, the bark on them is thicker, has become ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1816 Excerpt: ...will be thrown upon the injured part, and inflammation with its consequences follow. o Hence it will not be difficult to understand, how the canker appears on the young and tender shoots, while the trunk and larger branches are free; because, from age and exposure to the weather, the bark on them is thicker, has become hard and rigid, and the resistance greater than on these young and tender shoots. This too will explain how those trees which grow freely are more subject to canker, than those which are languid; for their vigorous growth shews a greater influx of fluids or nourishment; and it will be found, on examination, that these diseased or cankered trees have generally as healthy roots, and as many capillary, and often more than the most healthy tree; and these capillary roots nearer the bulb, frequently proceeding immediately from it. This disease in fruit-trees, called canker, can as easily be traced through all its stages, as inflammation in the animal. First of all, we observe the sap bursting out, like sweat or dew, on the external part of the bark, soon after corroding it, and forming a ragged substance. The inmost bark, however, is often preserved, a new longitudinal bark is generated, the diseased part is thrown off, and no other consequence follows, the motion of the sap goes on as usual; this we would call resolution. Sometimes the disease goes a little farther: the whole bark on one side is destroyed; but the sound separating from the diseased, its edges adhere to the wood, it preserves a passage for the sap on the opposite side, and saves the tree or branch: this may be compared to suppuration. We have to observe here, that this seldom or never takes place, when the tree is much bark-bound, but when the tree is not bark-bound, it seldom or ...
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Add this copy of A Treatise on the Physiology and Pathology of Trees: to cart. $56.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.