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Philosophical Transactions of the Royal Society of London
Royal Society (Great Britain)
Volledige weergave - 1835
already angle appears attraction becomes bodies cause chaleur circumstance Cloudy collection colour combination common consequently considerable considered contained corundum crystals described Description deux direction distance earth effect equal examined existence experiments expressions faces Fair give given glass grains greater heat hyperoxygenized muriate imperfect inches iron kind known latter less light lines manner matrix means measure mentioned metallic method minute motion muriatic acid nature nearly necessary object observed obtained oxide oxygenized particles perfect perfectly pieces planes Plate portion potash precipitate present prism probably produced proportion pyramid quantity Rain reflection refractive remain respect result rhomboid salt seen separated side similar situated solution sometimes stars stone substance sufficient supposed surface taken terminal tion transparent undulations Ursś verre whole
Pagina 21 - ... will affect equally the particles in unison with yellow and blue, and produce the same effect as a light composed of those two species ; and each sensitive filament of the nerve may consist of three portions, one for each principal colour.
Pagina 28 - ... the obstacle. . . . The waves on the surface of stagnating water, passing by the sides of a broad obstacle which stops part of them, bend afterwards and dilate themselves gradually into the quiet water behind the obstacle. The waves, pulses or vibrations of the air, wherein sounds consist, bend manifestly, though not so much as the waves of water.
Pagina 28 - The waves, pulses or vibrations of the air, wherein sounds consist, bend manifestly, though not so much as the waves of water. For a bell or a cannon may be heard beyond a hill which intercepts the sight of the sounding body, and sounds are propagated as readily through crooked pipes as through straight ones. But light is never known to follow crooked passages nor to bend into the shadow.
Pagina 498 - ... one, has also, as it may be called, a power of penetrating into time past. To explain this, we must consider that, from the known velocity of light, it may be proved, that when we look at Sirius, the rays which enter the eye cannot have been less than 6 years and 4^- months coming from that star to the observer.
Pagina 28 - Are not all hypotheses erroneous in which Light is supposed to consist in pression or motion propagated through a fluid medium P ' ' If it consisted in pression or in motion propagated either in an instant or in time, it would bend into the shadow.
Pagina 29 - For the fixed stars, by the interposition of any of the planets, cease to be seen. And so do the parts of the sun by the interposition of the moon. Mercury, or Venus. The rays which pass very near to the edges of any body are bent a little by the action of the body...
Pagina 15 - Is not the heat of the warm room conveyed through the vacuum by the vibrations of a much subtiler medium than air, which, after the air was drawn out remained in the vacuum?
Pagina 521 - ... in diameter. The star is perfectly in the centre, and the atmosphere is so diluted, faint, and equal throughout, that there can be no surmise of its consisting of stars ; nor can there be a doubt of the evident connection between the atmosphere and the star. Another star not much less in brightness, and in the same field with the above, was perfectly free from any such appearance.