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Updated: May 8, 2025
He turned up at Euston, a little after twelve. We went down together. It was getting on for one when we left the station at the other end, and then we began the tramp across the Weald to the inn. Our talk, too, was about work, not molecules and osmosis. The inn was only a roadside beerhouse I have forgotten its name and all its sleeping accomodation was the one double-bedded room.
When we say growth, metabolism, osmosis, the colloidal state, science points out that all this may be affirmed of inorganic bodies. When we say a life principle, a vital force or soul or spirit or intelligence, science turns a deaf ear. The difference between the living and the non-living is not so much a physical difference as a metaphysical difference. Living matter is actuated by intelligence.
Strength and peace seemed to pour from her being into his by a sort of spiritual osmosis. She resigned her head to his palm in order that he might lift her lips to his when he pleased. After all, there is no way for a man to rest without a woman. All he can do is to stop work.
The action produced by the tendency of fluids to mix, or become equally diffused in contact with each other, is known as osmosis, a form of molecular attraction allied to that of adhesion. The various physical processes by which the products of digestion are transferred from the digestive canal to the blood may be illustrated in a general way by the following simple experiments.
All substances, however, that appear to be in solution are not able to penetrate membranes, or take part in osmosis. *Kinds of Solutions in the Body.*—The substances in solution in the body liquids are of two general kinds known as colloids and crystalloids. The crystalloids are able to pass through membranous partitions, while the colloids are not.
As the water is drawn in at the roots, it flows out at the top, to which point it rises by capillary attraction and a process called osmosis. Neither of them is a strictly vital process, since both are found in the inorganic world; but they are in the service of what we call a vital principle. Some physicists and biochemists laugh at the idea of a vital principle.
A hundred jars of hard earthenware are strongly individualized, but it is possible for them to be all equally empty or all equally full of the same homogeneous liquid, whereas two bladders of so delicate a membrane as to admit of the action of osmosis and exosmosis may be strongly differentiated and contain liquids of a very mixed composition.
These considerable results can evidently be invoked as a posteriori proofs of the exactitude of the experimental laws of osmosis. They are not, however, the only ones that Professor Van t' Hoff has obtained by the same method.
In the same way the living machine has its excretory system for removing wastes. In the removal of the carbonic acid and water we have to do once more with the respiratory system, and the process is simply a repetition of the story of gas diffusion, chemical union, and osmosis. It is sufficient here to say that the process is just as simple and as easily explained as those already described.
There is something there that seizes hold of the droplets of oil by means of little extruded processes, and then passes them through its own body to excrete them on an inner surface into the blood-vessels. "This fat absorption thus appears to be a vital process and not one simply controlled by physical forces like osmosis.
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