Get Animal and Vegetable Physiology. 2 Volume Paperback Set: PDF

By Peter Mark Roget

ISBN-10: 110800007X

ISBN-13: 9781108000079

Below the phrases of the desire of the Oxford pupil Francis Henry, Earl of Bridgewater (1756-1829), Fellow of the Royal Society, absentee rector and willing manuscript-collector, a chain of books was once commissioned, designed to give a contribution to an realizing of the realm as created by means of God. In 1834 Peter Roget, who was once on the time compiling his celebrated glossary, contributed a two-volume treatise to that arguable sequence, which shaped a part of the complicated highbrow heritage to Darwin's paintings on evolution. Roget defined, in a fashion designed to entice a large viewers, the diversity and complexity of the plant and animal kingdoms, focussing on mechanics within the first quantity and body structure within the moment. The interconnected features of person vegetation and animals are noticeable as proving God's layout. The arguments chanced on right here resonate with debates that proceed at the present time, in addition to delivering resource fabric for historians of technology.

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Additional info for Animal and Vegetable Physiology. 2 Volume Paperback Set: Animal and Vegetable Physiology: Considered with Reference to Natural Theology

Sample text

With regard to the exact channels through which it passes, the same degree of uncertainty prevails as with regard to those which transmit the ascending sap. De Candolle maintains that, in either case, the fluids find their way through the intercellular spaces : other physiologists, however, are of opinion, that particular vessels are appropriated to the office of transmitting the descending sap. The extreme minuteness of the organs of vegetables has hitherto presented insuperable obstacles to the investigation of this important question: and consequently our reasonings respecting it can be founded only on indirect evidence.

With oxygen, and then being precipitated from, its combination in the manner above described. It is not the whole of the carbon introduced into the vegetable system, in the form of carbonic acid, which has to undergo the first of these changes, a part of that carbon being already in the condition to which that operation would reduce it, and consequently in a state fit to receive the decomposing action of the leaves. The whole of these chemical changes may be included under the general term Aeration.

In the natural progress of growth, the roots are constantly shooting forwards in the direction they have first taken, whether horizontally, or vertically, or at any other inclination. Thus they continually arrive at new portions of soil, of which the nutritive matter has not yet been exhausted; and as a constant relation is preserved between their lateral extension and the horizontal spreading of the branches, the greater part of the rain which falls upon the tree, is made to drop from the leaves at the exact distance from the trunk, where, after it has soaked through the earth, it will be received by the extremities of the roots, and readily sucked in by the spongioles.

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Animal and Vegetable Physiology. 2 Volume Paperback Set: Animal and Vegetable Physiology: Considered with Reference to Natural Theology by Peter Mark Roget

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