Introduction to the Study of the Scientific Principles of Agriculture: Being the Inaugural Lecture, Delivered May 6, 1884, at the University Museum, OxfordH. Frowde, 1884 - 47 pagina's |
Overige edities - Alles bekijken
Introduction to the Study of the Scientific Principles of Agriculture: Being ... J. Henry Gilbert Geen voorbeeld beschikbaar - 2017 |
Introduction to the Study of the Scientific Principles of Agriculture: Being ... Joseph Henry Gilbert Geen voorbeeld beschikbaar - 2015 |
Introduction to the Study of the Scientific Principles of Agriculture: Being ... Joseph Henry Gilbert Geen voorbeeld beschikbaar - 2018 |
Veelvoorkomende woorden en zinsdelen
agri Agricole agricultural chemistry Alsace AMEN CORNER ammonia amount of mechanical amount of nitrogen animal body animal manures appearance of Liebig's atmosphere botanical carbonic acid change of matter chemical Chemico-Agricultural Society Chemist combined nitrogen composition constituents of food constituents of plants contained culture description of plant determined different crops different manures edition enquiry excretions exercise of force existing knowledge experimental evidence experiments Fallow field-experiments given area growth humus hydrogen importance incombustible increase JOSEPH HENRY GILBERT laboratory land late Professor leguminous Liebig mechanical force mineral constituents nitric acid non-nitrogenous constituents Organic Chemistry oxygen Physiology plots principles of agriculture Professor Daubeny PROFESSOR OF RURAL proportion reference Rothamsted Royal Agricultural Society Royal Meteorological Societies Rural Economy samples Saussure scientific principles SIBTHORPIAN PROFESSOR Sir Humphrey Davy stituents subsequent lectures substance supply Thaer tion tissue UNIVERSITY OF OXFORD various manures vegetable and animal Wheat whilst
Populaire passages
Pagina 42 - I propose to take up the subject of the feeding of animals, for the production of meat, milk, and manure, and for the exercise of force — that is, for their labour. Also, if opportunity should occur, to treat of the question of the application of town-sewage to the land. Finally, I should observe that, throughout the illustrations which I shall bring before you, it will be my endeavour to keep in view the bearing of the data with which I...
Pagina 30 - I shall be happy if I succeed in attracting the attention of men of science to subjects which so well merit to engage their talents and energies. Perfect agriculture is the true foundation of all trade and industry — it is the foundation of the riches of states.
Pagina 18 - As an immediate effect of the manifestation of mechanical force, we see that a part of the muscular substance loses its vital properties, its character of life ; that this portion separates from the living part, and loses its capacity of growth and it?
Pagina 20 - The sum of the mechanical effects produced in two individuals, in the same temperature, is proportional to the amount of nitrogen in their urine; whether the mechanical force has been employed in voluntary or involuntary motions, whether it has been consumed by the limbs, or by the heart and other viscera.
Pagina 30 - But a rational system of Agriculture cannot be formed without the application of scientific principles ; for such a system must be based on an exact acquaintance with the means of nutrition of vegetables, and with the influence of soils and actions of manure upon them.
Pagina 18 - ... chemical character by combining with zinc) ; and all experience proves, that this conversion of living muscular fibre into compounds destitute of vitality is accelerated or retarded according to the amount of force employed to produce motion. Nay, it may safely be affirmed, that they are mutually proportional ; that a rapid transformation of muscular fibre, or, as it may be called, a rapid change of matter...
Pagina 20 - ... that the amount of force exercised in the animal body was measurable by the amount of nitrogenous substance transformed, and this again by the amount of urea found in the urine. To Liebig's views on this latter point, as well as on the question of the sources in the food of the fat of the animal body, and on some other points of scientific as well as practical interest, reference will be made further on, when considering each of these several questions independently. In the meantime our special...
Pagina 5 - ... into the limits of an hour's discourse anything approaching to an adequate account, either of the progress made during the last forty years, or of the existing condition of agricultural chemistry. For what is agricultural chemistry ? It is the chemistry of the atmosphere ; the chemistry of the soil ; the chemistry of vegetation ; and the chemistry of animal life and growth.
Pagina 6 - Davy passed in review and correlated the then existing knowledge, both practical and scientific, bearing upon agriculture. He treated of the influences of heat and light ; of the organisation of plants ; of the difference, and the change, in the chemical composition of their different parts ; of the sources, composition, and treatment of soils ; of the composition of the atmosphere, and its influence on vegetation ; of the composition and the action of manures ; of fermentation and putrefaction ;...
Pagina 42 - The chemistry of the malting process, the loss of food constituents during its progress, and the comparative feeding value of barley and malt have been investigated.