A Short History of Natural Science and of the Progress of Discovery: From the Time of the Greeks to the Present Day : for the Use of Schools and Young PersonsD. Appleton, 1886 - 467 páginas |
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Página xxi
... pieces of Ice melt by Friction - His conclusion about Heat - How ' Latent Heat ' is explained on the theory that Heat is a kind of Motion - Dr . Mayer suggests the Determination of the Mechanical Equivalent of Heat - Dr . Joule's ...
... pieces of Ice melt by Friction - His conclusion about Heat - How ' Latent Heat ' is explained on the theory that Heat is a kind of Motion - Dr . Mayer suggests the Determination of the Mechanical Equivalent of Heat - Dr . Joule's ...
Página 16
... pieces , each piece will grow , showing that the parts of a plant are simple and do not depend very closely upon each other . But an ani- mal , and especially one of the higher animals , is a most complicated piece of machinery . If you ...
... pieces , each piece will grow , showing that the parts of a plant are simple and do not depend very closely upon each other . But an ani- mal , and especially one of the higher animals , is a most complicated piece of machinery . If you ...
Página 22
... piece of wood or metal across it , you will find there is one point at which the ruler will balance . When you have balanced it , put an ounce weight on each end and it will still balance at the same point , which is called the fulcrum ...
... piece of wood or metal across it , you will find there is one point at which the ruler will balance . When you have balanced it , put an ounce weight on each end and it will still balance at the same point , which is called the fulcrum ...
Página 44
... piece of camphor in a flask with a stopper to it , and heat it very gently either by placing it in the sun or at some distance above a lighted candle , the cam- phor will gradually disappear from the bottom of the flask , and collect in ...
... piece of camphor in a flask with a stopper to it , and heat it very gently either by placing it in the sun or at some distance above a lighted candle , the cam- phor will gradually disappear from the bottom of the flask , and collect in ...
Página 53
... piece of iron rubbed on a loadstone becomes itself a magnet , and will attract other pieces of iron . But Flavio Gioja discovered a new peculiarity in a piece of magnetised iron , which led to his making the mariner's compass . He found ...
... piece of iron rubbed on a loadstone becomes itself a magnet , and will attract other pieces of iron . But Flavio Gioja discovered a new peculiarity in a piece of magnetised iron , which led to his making the mariner's compass . He found ...
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Términos y frases comunes
acid Alhazen anatomy animals astronomers attraction battery began bodies born calculations called cause CENTURY CONTINUED Charles Lyell chemical chemistry chemists colours comet Cuvier cylinder dark died discovered discoveries earth eighteenth century electric current Encyclopædia Encyclopædia Britannica Erasistratus exactly experiments explained facts famous formed fossils Galileo Galvani Geber Geology glass globe going gravitation Greeks Haller heat Herschel Hipparchus Huyghens hydrogen invented John Herschel Jupiter Kepler Lagrange Lamarck Laplace lines Linnæus living magnet mercury metals meteors moon moving round named Natural needle Newton observations orbit oxygen pass phlogiston piece piston planets prism produced Professor proved Ptolemy refracted remember rocks round the sun showed side spectrum St.-Hilaire stars steam substances telescope theory tion transit of Venus tricity tube turned Uranus Venus Vesalius vibrations Voltaic Pile Watt waves weight wire young
Pasajes populares
Página 125 - Our business was (precluding matters of Theology and state affairs) to discourse and consider of Philosophical Enquiries, and such as related thereunto : as physick, anatomy, geometry, astronomy, navigation, staticks, magneticks, chymicks, mechanicks, and natural experiments ; with the state of these studies, as then cultivated at home and abroad.
Página 101 - ... that the squares of the periodic times of the planets are proportional to the cubes of their mean distances from the sun.
Página 125 - Saturn, the spots in the sun, and its turning on its own axis", the inequalities and selenography of the moon, the several phases of Venus and Mercury, the improvement of telescopes, and grinding of glasses for that purpose, the weight of air, the possibility, or impossibility of vacuities, and nature's abhorrence thereof, the Torricellian experiment in quicksilver, the descent of heavy bodies, and the degrees of acceleration therein ; and divers other things of like nature.
Página 234 - The feeling of it to my lungs was not sensibly different from that of common air ; but I fancied that my breast felt peculiarly light and easy for some time afterwards. Who can tell but that, in time, this pure air may become a fashionable article in luxury Hitherto only two mice and myself have had the privilege of breathing it."* * Dr.
Página 170 - I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.