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amount approximately Arctic Arctic Ocean astronomical atmosphere atoms axis balance-wheel beats body British Association calculated Carnot's centimetres century chemical chronometer clock cooling Croll crust Daniel Bernoulli degree depth dynamical earth earth's rotation electric engine equal estimate experiments feet force friction geological geologists give Glasgow globe gravitation heat Horatius Cocles hypothesis ice-cap investigation isoperimetrical problem Joule Joule's kilometres laboratory land liquid magnetic storms marine chronometer mass mathematical matter mechanical effect melting meteoric metres miles million moment of inertia moon moon's motion Natural Philosophy North nutation observations observatories ocean orbit pendulum period phenomena physical plutonic Pole potential energy practical precession present principles probable produced Professor Huxley quantity regarding result rock round Royal Society scientific solar solid spheroid sun's supposed surface telegraph terrestrial magnetism theory thickness Thomson tidal tides tion underground temperature uniformitarianism University variations velocity vibration whole
Seite 534 - That gravity should be innate, inherent and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of any thing else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man who has in philosophical matters a competent faculty of thinking, can ever fall into it.
Seite 154 - Accurate and minute measurement seems to the nonscientific imagination, a less lofty and dignified work than looking for something new. But nearly all the grandest discoveries of science have been but the rewards of accurate measurement and patient long-continued labour in the minute sifting of numerical results.
Seite 83 - It seems, therefore, on the whole most probable that the sun has not illuminated the earth for 100,000,000 years, and almost certain that he has not done so for 500,000,000 years. As for the future, we may say, with equal certainty, that inhabitants of the earth cannot continue to enjoy the light and heat essential to their life, for many million years longer, unless sources now unknown to us are prepared in the great storehouse of creation.
Seite 198 - ... ripe beauty, by a fiat of Creative Power ? or did vegetation, growing up from seed sown, spread and multiply over the whole Earth...
Seite 201 - There is grandeur in this view of life, with its several powers, having been originally breathed by the Creator into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being evolved.
Seite 458 - It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
Seite 598 - Columns, forming a medium of Scientific discussion and of intercommunication among the most distinguished men of Science...
Seite 513 - A sudden outburst of light, far exceeding the brightness of the sun's surface, was seen to take place, and sweep like a drifting cloud over a portion of the solar face. This was attended with magnetic disturbances of unusual intensity, and with exhibitions of aurora of extraordinary brilliancy. The identical instant at which the effusion of light was observed was recorded by an abrupt and strongly marked deflection in the self-registering instruments at Kew.
Seite 201 - It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent on each other in so complex a manner, have all been produced by laws acting around us.
Seite 458 - If this axiom be denied for all temperatures, it would have to be admitted that a self-acting machine might be set to work and produce mechanical effect by cooling the sea or earth, with no limit but the total loss of heat from the earth and sea, or, in reality, from the whole material world.