Modern development of the physical sciencesHarper & brothers, 1904 |
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عبارات ومصطلحات مألوفة
animals appear Arago astronomers atmosphere axis battery body cause centre century CHARLES LYELL comet conceived condensation continue Cuvier deflected degrees Devonian discovery distance doctrine earth effect electricity electro-magnetic energy epoch ether existence experiments falling force Faraday fluid formation fossil Fresnel galvanic galvanometer geological geologist glaciers globe gravitation Gulf Stream heat Herschel Humphry Davy hundred Hutton hypothesis idea inch James Hutton Joule land less light Lord Kelvin Lyell magnetic mass matter ment meteorologist meteors Michael Faraday miles molecules moraines motion nature nebulæ needle observations ocean orbits origin Orohippus paleontologist paper particles phenomena philosophers phosphorescence physicist planets plates present produced Professor rays region revolving rings rocks Royal Society Rumford seemed solid space species stars strata substance supposed surface temperature theory Thomas Young thought tion tricity tube undulations uniformitarian valley vapor velocity whirl wire Young
مقاطع مشهورة
الصفحة 51 - That orbed maiden with white fire laden, Whom mortals call the moon, Glides glimmering o'er my fleece-like floor, By the midnight breezes strewn ; And wherever the beat of her unseen feet, Which only the angels hear, May have broken the woof of my tent's thin roof, The stars peep behind her and peer ; And I laugh to see them whirl and flee, Like a swarm of golden bees...
الصفحة 96 - I look at the geological record as a history of the world imperfectly kept, and written in a changing dialect; of this history we possess the last volume alone, relating only to two or three countries. Of this volume, only here and there a short chapter has been preserved ; and of each page, only here and there a few lines.
الصفحة 173 - Egypt: and then it happened, that through all the city, for the space almost of forty days, there were seen horsemen running in the air, in cloth of gold, and armed with lances, like a band of soldiers, and troops of horsemen in array, encountering and running one against another, with shaking of shields, and multitude of pikes, and drawing of swords, and casting of darts, and glittering of golden ornaments, and harness of all sorts.
الصفحة 112 - On the evidence of palaeontology, the evolution of many existing forms of animal life from their predecessors is no longer an hypothesis, but an historical fact ; it is only the nature of the physiological factors to which that evolution is due which is still open to discussion.
الصفحة 256 - Manchester a pound weight falling through seven hundred and seventy-two feet could generate enough heat to raise the temperature of a pound of water one degree Fahrenheit.
الصفحة 299 - To form some conception of the degree of coarse-grainedness indicated by this conclusion, imagine a rain drop, or a globe of glass as large as a pea, to be magnified up to the size of the earth, each constituent molecule being magnified in the same proportion. The magnified structure would be coarser grained than a heap of small shot, but probably less coarse grained than a heap of cricketballs.
الصفحة 215 - In reasoning on this subject, we must not forget to consider that most remarkable circumstance, that the source of the Heat generated by friction in these experiments, appeared evidently to be inexhaustible. ' It is hardly necessary to add, that anything which any insulated body or system of bodies can continue to furnish without limitation, cannot possibly be a material substance.
الصفحة 272 - That the quantity of heat produced by the friction of bodies, whether solid or liquid, is always proportional to the quantity of force expended.
الصفحة 253 - ... into chemical force. The beautiful experiments of Seebeck and Peltier show the convertibility of heat and electricity ; and others by Oersted and myself show the convertibility of electricity and magnetism. But in no case, not even in those of the Gymnotus and Torpedo, is there a pure creation or a production of power without a corresponding exhaustion of something to supply it.
الصفحة 283 - Whatever difficulties we may have in forming a consistent idea of the constitution of the ether, there can be no doubt that the interplanetary and interstellar spaces are not empty, but are occupied by a material substance or body which is certainly the largest and probably the most uniform body of which we have any knowledge.