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The lowest plant, or animalcule, feeds, grows, and reproduces its kind. In addition, all animals manifest those transitory changes of form which we class under irritability and contractility; and, it is more than probable, that when the vegetable world is thoroughly explored, we shall find all plants in possession of the same powers, at one time or other of their existence.
The lowest plant, or animalcule, feeds, grows, and reproduces its kind. In addition, all animals manifest those transitory changes of form which we class under irritability and contractility; and, it is more than probable, that when the vegetable world is thoroughly explored, we shall find all plants in possession of the same powers, at one time or other of their existence.
With a qualification, to be considered presently, the answer to this question is undoubtedly in the affirmative. The contractility which is the fundamental condition of locomotion, has not only been discovered to exist far more widely among plants than was formerly imagined; but, in plants, the act of contraction has been found to be accompanied, as Dr.
The writer instances those simple ideas, colour, hardness, extension, weight, which, he says, make up our complex ideas of gold or iron. He instances, too, the ideas of resistance, muscular contractility, direction, extension, place, and motion, of which he says our apparently simple idea, weight, is compounded.
I am not now alluding to such phaenomena, at once rare and conspicuous, as those exhibited by the leaflets of the sensitive plants, or the stamens of the barberry, but to much more widely spread, and at the same time, more subtle and hidden, manifestations of vegetable contractility.
I am not now alluding to such phenomena, at once rare and conspicuous, as those exhibited by the leaflets of the sensitive plants, or the stamens of the barberry, but to much more widely spread, and at the same time, more subtle and hidden, manifestions of vegetable contractility.
The lowest plant, or animalcule, feeds, grows, and reproduces its kind. In addition, all animals manifest those transitory changes of form which we class under irritability and contractility; and it is more than probable that when the vegetable world is thoroughly explored, we shall find all plants in possession of the same powers, at one time or other of their existence.
All the trees of this order are natives of South America, and especially of Guiana. Mr. Tamburini some time ago observed that, during a period of lethargy, the approach of a magnet produced in persons affected with hysterical hypnosis a series of modifications of the respiratory functions and of contractility. From some very careful experiments made by him and Mr.
Among the lower plants, it is the rule rather than the exception, that contractility should be still more openly manifested at some periods of their existence.
Nor is there any doubt that the youngest child knows perfectly well what it means when, trying to lift a stone, it calls the stone heavy, although it might not be more difficult to make the stone itself than the child understand what is meant by muscular contractility.
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