A Treatise On the Physiology And Pathology of Trees: With Observations On ...
A Treatise On the Physiology And Pathology of Trees: With Observations On ...
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In our eReader you can find the full English version of the book. Read A Treatise On the Physiology And Pathology of Trees: With Observations On ... Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Treatise On the Physiology And Pathology of Trees: With Observations On ...
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We find there are two opinions among professional men of a descending sap : one, that the sap ascend* in spring, and descends in autumn : the other, that there is a continued ascent and descent at the same time ; that the sap ascends in one set of vessels and descends in another set, like tb# circulation of the blood in the animal body.
We look upon both these opinions equally void of foundation. With regard to the first, the sap cannot remain in the roots, for they have not capacity to contain... it; and we do not find them fuller of sap in winter than in summer.
We cannot imagine that it passes every s^asop into the ground ; and that the capillary roots have to extract that eveiy year \\^t they had done the year before ; and we do not find the ground about the roots more moist in autuoin, after the supposed descent of the sap, than in summer. Further, if the sap descended every autumn to the roots or earth, we should find Digitized by VjOOQ IC 61 tlie new vegetation in spring begin at the root and gradually ascend ; but we find no such thing; we find the bark relaxed, the buds sweH, and the blossom and leaves expand, as soon at the top as at the root of the tree ; and we find the same appearance take place at the extremities of the branches as soon as at the trunk.
What to read after A Treatise On the Physiology And Pathology of Trees: With Observations On ...?
You can find similar books in the "Read Also" column, or choose other free books by Patrick Lyon to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
We find there are two opinions among professional men of a descending sap : one, that the sap ascend* in spring, and descends in autumn : the other, that there is a continued ascent and descent at the same time ; that the sap ascends in one set of vessels and descends in another set, like tb# circulation of the blood in the animal body.
We look upon both these opinions equally void of foundation. With regard to the first, the sap cannot remain in the roots, for they have not capacity to contain... it; and we do not find them fuller of sap in winter than in summer.
We cannot imagine that it passes every s^asop into the ground ; and that the capillary roots have to extract that eveiy year \\^t they had done the year before ; and we do not find the ground about the roots more moist in autuoin, after the supposed descent of the sap, than in summer. Further, if the sap descended every autumn to the roots or earth, we should find Digitized by VjOOQ IC 61 tlie new vegetation in spring begin at the root and gradually ascend ; but we find no such thing; we find the bark relaxed, the buds sweH, and the blossom and leaves expand, as soon at the top as at the root of the tree ; and we find the same appearance take place at the extremities of the branches as soon as at the trunk.
What to read after A Treatise On the Physiology And Pathology of Trees: With Observations On ...?
You can find similar books in the "Read Also" column, or choose other free books by Patrick Lyon to read onlineMoreLess
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