Mit mondanak mások - Írjon ismertetőt
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acceleration angle angular angular momentum aphelion atmosphere attraction axis calm belt Caribbean Sea cause celestial bodies centre of gravity centrifugal effect centrifugal energy circular orbit circulation comet common centre constant constraining guide course Davis Straits deflected centrifugal force demonstrated Deschamel dish disturbance earth energy of eastation equal equator equilibrium fall flow fugal Gulf of Mexico Gulf Stream heat heavier horizontal currents increased latitude lighter mentum miles momentum moon move movement nature nebulous matter Newton observed ocean currents opposite and parallel overflow parallel and opposite parallel direction parallelogram of forces passing perihelion phenomena planet planetary orbit polar poles position pound weight power of eastation pressure primitive impulse produce resistance revolving rotation round saltness Saturn sawdust says similar Sir John Herschel small orbit space sphere Straits of Florida sun's repulsive supposed surface theory tion trade-winds urged velocity vertical warm warmer whilst winds zone
50. oldal - But hitherto I have not been able to discover the cause of those properties of gravity from phenomena, and I frame no hypothesis ; for whatever is not deduced from the phenomena is to be called an hypothesis; and hypotheses, whether metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy.
1. oldal - There is a river in the ocean: in the severest droughts it never fails, and in the mightiest floods it never overflows; its banks and its bottom are of cold water, while its current is of warm; the Gulf of Mexico is its fountain, and its mouth is in the Arctic Seas. It is the Gulf Stream. There is in the world no other such majestic flow of waters. Its current is more rapid than the Mississippi or the Amazon, and its volume more than a thousand times greater.
50. oldal - I frame no hypotheses; for whatever is not deduced from the phenomena is to be called an hypothesis; and hypotheses, whether metaphysical or physical, whether of occult qualities or mechanical, have no place in experimental philosophy. In this philosophy particular propositions are inferred from the phenomena, and afterwards rendered general by induction. Thus it was that the impenetrability, the mobility, and the impulsive force of bodies, and the laws of motion and of gravitation, were discovered....
1. oldal - Gulf Stream water, while the other half is in common water of the sea ; so sharp is the line, and such the want of affinity between those waters, and such, too, the reluctance, so to speak, on the part of those of the Gulf Stream to mingle with the common water of the sea.
49. oldal - This is certain, that it must proceed from a cause that penetrates to the very centres of the sun and planets, without suffering the least diminution of its force; that operates not according to the quantity of the surfaces of the particles upon which it acts (as mechanical causes used to do), but according to the quantity of the solid matter which they contain, and propagates its virtue on all sides to immense distances, decreasing always as the inverse square of the distances.
81. oldal - There is, beyond question, some profound secret and mystery of nature concerned in the phenomenon of their tails. Perhaps it is not too much to hope that future observation, borrowing every aid from rational speculation, grounded on the progress of physical science generally (especially those branches of it which relate to the...
24. oldal - If any vessel will take up her position a little to the northward of Bermuda, and steering thence for the capes of Virginia, will try the water-thermometer all the way at short intervals, she will find its reading to be now higher, now lower ; and the observer will discover that he has been crossing streak after streak of warm and cool water in regular alternations.
49. oldal - Gravitation towards the sun is made up out of the gravitations towards the several particles of which the body of the sun is composed ; and in receding from the sun decreases accurately...