Popular Lectures and Addresses: Geology and general physicsMacmillan and Company, 1894 |
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Стр. 2
... heat , that " It is perfectly certain that more than ten per cent . of the terrestrial radiation from the soil of England is stopped within 10 feet of the surface of the soil , " by the absorption it suffers from aqueous vapour ; it ...
... heat , that " It is perfectly certain that more than ten per cent . of the terrestrial radiation from the soil of England is stopped within 10 feet of the surface of the soil , " by the absorption it suffers from aqueous vapour ; it ...
Стр. 3
... heat by radiation from the earth's surface , it is , even in the most humid conditions of optically clear atmosphere , insufficient to prevent heavy dews by radiation into space of the latent heat of the vapour from which they are ...
... heat by radiation from the earth's surface , it is , even in the most humid conditions of optically clear atmosphere , insufficient to prevent heavy dews by radiation into space of the latent heat of the vapour from which they are ...
Стр. 6
... heat lost out of the earth would have been about as much as would heat , by 100 ° Cent . , a quantity of ordinary surface rock of 100 times the earth's bulk . ( See calculation appended . ) This would be more than enough to melt a mass ...
... heat lost out of the earth would have been about as much as would heat , by 100 ° Cent . , a quantity of ordinary surface rock of 100 times the earth's bulk . ( See calculation appended . ) This would be more than enough to melt a mass ...
Стр. 7
... heat has been lost . APPENDIX . ESTIMATE OF PRESENT ANNUAL LOSS OF HEAT FROM THE EARTH . LET A be the area of the earth's surface , D the increase of depth in any locality for which the tem- perature increases by 1 ° Cent . , and the ...
... heat has been lost . APPENDIX . ESTIMATE OF PRESENT ANNUAL LOSS OF HEAT FROM THE EARTH . LET A be the area of the earth's surface , D the increase of depth in any locality for which the tem- perature increases by 1 ° Cent . , and the ...
Стр. 8
... heat s per unit of bulk is Ars . Hence 3k Dr's is the elevation of temperature which a quantity of heat equal to that lost from the earth in a year , would produce in a mass of rock equal in bulk to the whole earth . The laboratory ex ...
... heat s per unit of bulk is Ars . Hence 3k Dr's is the elevation of temperature which a quantity of heat equal to that lost from the earth in a year , would produce in a mass of rock equal in bulk to the whole earth . The laboratory ex ...
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Popular Lectures and Addresses: Geology and general physics William Thomson Baron Kelvin Полный просмотр - 1894 |
Popular Lectures and Addresses: Geology and general physics William Thomson Baron Kelvin Полный просмотр - 1894 |
Popular Lectures and Addresses: Geology and general physics William Thomson Baron Kelvin Полный просмотр - 1894 |
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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 depth dynamical earth earth's rotation electric engine equal estimate experiments feet force friction geological geologists give Glasgow globe gravitation Horatius Cocles hypothesis ice-cap influence 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 radiation rate of augmentation regarding result rock Royal Society scientific solar solid spheroid supposed surface telegraph terrestrial magnetism theory thickness Thomson tidal tides tion underground temperature uniformitarianism University variations velocity vibration whole
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Стр. 538 - 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.
Стр. 156 - 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.
Стр. 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.
Стр. 200 - ... ripe beauty, by a fiat of Creative Power ? or did vegetation, growing up from seed sown, spread and multiply over the whole Earth...
Стр. 102 - Mathematics may be compared to a mill of exquisite workmanship, which grinds you stuff of any degree of fineness ; but, nevertheless, what you get out depends on what you put in ; and as the grandest mill in the world will not extract wheat-flour from peascods, so pages of formulae will not get a definite result out of loose data.
Стр. 203 - 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.
Стр. 204 - Laputan method of making books, and that it did not sufficiently take into account a continually guiding and controlling intelligence. This seems to me a most valuable and instructive criticism. I feel profoundly convinced that the argument of design has been greatly too much lost sight of in recent zoological speculations. Reaction against the frivolities of teleology, such as are to be found, not rarely, in the notes of the learned commentators on Paley's
Стр. 462 - 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.
Стр. 517 - 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.