By Peter Mark Roget
Below the phrases of the need of the Oxford student Francis Henry, Earl of Bridgewater (1756-1829), Fellow of the Royal Society, absentee rector and willing manuscript-collector, a sequence of books used to be commissioned, designed to give a contribution to an realizing of the area as created via God. In 1834 Peter Roget, who used to be on the time compiling his celebrated glossary, contributed a two-volume treatise to that arguable sequence, which shaped a part of the advanced highbrow heritage to Darwin's paintings on evolution. Roget defined, in a fashion designed to attract a large viewers, the range 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 the following resonate with debates that proceed this day, in addition to delivering resource fabric for historians of technology.
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Extra resources for Animal and Vegetable Physiology. 2 Volume Paperback Set: Animal and Vegetable Physiology: Considered with Reference to Natural Theology
All that we are permitted to see are the general results, namely the gradual deposition of the materials of the future alburnum and liber. These materials are first deposited in the form of a layer of glutinous substance, termed the Cambium; a substance which appears to consist of the solid portion of the sap, precipitated from it by the separation of the greater part of the water that held it in solution. The cambium becomes in process of time more and more consolidated, RETURN OF THE SAP. 41 and acquires the organization proper to the plant of which it now forms an integrant part: it constitutes two layers, the one, belonging to the wood, being the alburnum ; the other, belonging to the bark, being the liber.
The processes of the animal RETURN OF THE SAP. 39 economy, where the channels of distribution, and the organs of propulsion are plainly observable, afford but imperfect analogies to guide us in this intricate inquiry: for although it is true that in the higher classes of animals the circulation of the nutrient fluid, or blood, through distinct vessels, is sufficiently obvious, yet in the lower departments of the animal kingdom, and in the embryo condition even of the more perfect species, the nutritious juices are distributed without being confined within any visible vessels; and they either permeate extensive cavities in the interior of the body, or penetrate through the interstices of a cellular tissue.
From the circumstance of its being sent back from the leaves for distribution to the several organs where its presence is required, it has received the name of the returning sup, that it might be distinguished from the crude fluid RETURN OF THE SAP. 37 which arrives at the leaves, and which is termed the ascending sap. The returning sap still contains a considerable quantity of water, in its simple liquid form; which was necessary in order that it might still be the vehicle of various nutritive materials that are dissolved in it.
Animal and Vegetable Physiology. 2 Volume Paperback Set: Animal and Vegetable Physiology: Considered with Reference to Natural Theology by Peter Mark Roget