The Vegetable System: Or, a Series of Experiments, And ..., volume 1
The Vegetable System: Or, a Series of Experiments, And ..., volume 1
Hill John
The book The Vegetable System: Or, a Series of Experiments, And ..., volume 1 was written by author Hill John Here you can read free online of The Vegetable System: Or, a Series of Experiments, And ..., volume 1 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Vegetable System: Or, a Series of Experiments, And ..., volume 1 a good or bad book?
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Thcfe are fo many extremely minute tubes, up which the fluid afcends by the attradbion of their fides ; and in this afcent it is greatly aflifted by that comprcflion and dilatation which arifes from the continual change of temperature in the air. The courfe of thefe Veflfels is ever the body of the Root, and up to the fummit of thofe Films wherein this outer Bark terminates. They are fpungy here as elfewhere, and the Juices they contain can eafily pafs in part thro* their furface. During the wa...rm hours of the day there is a conftant evaporation of part of this Juice of the outer Bark from the Films ; and by this means the VeflTels are often emptied, fafter than they can be fupplied by the Fibres*. On the other hand, when the heat of the day is over, and this evapora- tion ceafes, a new operation obtains in the fame parts : the air grows damp,, and the fpungy furfaces of thofe Veflels whk:h are expofed to it, can as eafily imbibe as they could before perfpire : therefore a great quantity of moifture is, during thefe hours of the night, taken in at the furfaces above ground, and makes its way, in fomc meafure, down the VeflTels.
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