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Página 158 - The sun's rays are the ultimate source of almost every motion which takes place on the surface of the earth. By its heat are produced all winds, and those disturbances in the electric equilibrium of the atmosphere which give rise to the phenomena of terrestrial
Página 158 - By their vivifying action, vegetables are elaborated from inorganic matter, and become, in their turn, the support of animals and of man, and the sources of those great deposits of dynamical efficiency, which are laid up for human use in our coal strata.
Página 177 - All things to Man's delightful use ; the roof Of thickest covert was inwoven shade, Laurel and myrtle, and what higher grew Of firm and fragrant leaf; on either side Acanthus, and each odorous bushy shrub, Fenced up the verdant wall; each beauteous flower— Iris all hues, roses, and jessamine, Reared high their flourished heads between, and wrought Mosaic : underfoot the violet, Crocus, and hyacinth, with rich inlay
Página 48 - it will not be too much to say, that this necessary quantity of Electricity is equal to a very powerful flash of lightning. Yet we have it under perfect command; can evolve, direct, and employ, it at pleasure; and when it has performed its full work of electrolyzation, it has only separated the elements of a single grain of
Página 48 - This view of the subject gives an almost overwhelming idea of the extraordinary quantity or degree of electric power, which naturally belongs to the particles of matter; but it is not inconsistent in the slightest degree, with the facts which can be brought to bear on this point.
Página 48 - Leyden battery would be necessary to supply electricity sufficient to decompose a single grain of water, or to equal the quantity of electricity which is naturally associated with the elements of that grain of water, endowing them with their mutual chemical affinity.
Página 48 - of platina and one of zinc, each one eighteenth of an inch in diameter, placed five sixteenths of an inch apart, and immersed to the depth of five-eighths of an inch in acid, consisting of one drop of oil of vitriol, and four ounces of distilled water, at
Página 41 - there should be no fermentation at all before the manure is used, than that it should be carried too far"—" The excess of fermentation tends to the destruction and dissipation of the most useful part of the manure; and the ultimate results of this process are like those of
Página 159 - phenomena of which, on however diminutive a scale, we have yet an unequivocal manifestation in our aurora borealis. The possible analogy of the solar light to that of the aurora, has been distinctly insisted on by my father, in his paper already cited. It would be a highly curious subject of experimental enquiry how far a mere reduplication of sheets
Página 160 - as we have seen, is about 60 radii of the earth distant from the centre of the latter. Its proximity, therefore, to its centre of attraction, thus estimated, is much greater than that of the planets to the sun; of which Mercury, the nearest is 84, and