How Sap Rises In the Leaves.
To a great degree, it is the result of a mode of diffusion which has been called endosmose. Water largely evaporates from the leaves; it flies off into the air as vapor, leaving behind all the earthy and the organic matters— these not being volatile. The sap in the cells of the leaf therefore becomes denser, and so draws upon the more watery contents of the Cells of the stalk, these upon those of the stem below, and so on from cell to ceil down to the root, causing a flow from the roots to the leaves, which begins in the latter, just as a wind begins in the direction toward which it blows.
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Manawatu Herald, 30 April 1898, Page 4
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120How Sap Rises In the Leaves. Manawatu Herald, 30 April 1898, Page 4
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