On the Connexion of the Physical SciencesJohn Murray, Albemarle Street., 1834 - 458 pages |
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Page 1
... surface of the earth with an accelerated velocity , and with a force proportional to their masses . By comparison , Newton proved that the force which occasions the fall of bodies at the earth's surface , is identical with that which ...
... surface of the earth with an accelerated velocity , and with a force proportional to their masses . By comparison , Newton proved that the force which occasions the fall of bodies at the earth's surface , is identical with that which ...
Page 9
... surface of the sea is there- fore spheroidal , and the surface of the earth only deviates from that figure where it rises above , or sinks below , the level of the sea ; but the deviation is so small that it is unimportant when compared ...
... surface of the sea is there- fore spheroidal , and the surface of the earth only deviates from that figure where it rises above , or sinks below , the level of the sea ; but the deviation is so small that it is unimportant when compared ...
Page 50
... surface , diminishes the force of gravity ; but the other , being at a tangent to the surface , urges the particles towards the equator , where they accumu- late till their numbers compensate the diminution of gravity ,, which makes the ...
... surface , diminishes the force of gravity ; but the other , being at a tangent to the surface , urges the particles towards the equator , where they accumu- late till their numbers compensate the diminution of gravity ,, which makes the ...
Page 54
... surface at every point perpendicular to the direction of gravitation , or of the plumb - line , and is the same which the sea would have if it were continued all round the earth beneath the continents . Such is the figure that has been ...
... surface at every point perpendicular to the direction of gravitation , or of the plumb - line , and is the same which the sea would have if it were continued all round the earth beneath the continents . Such is the figure that has been ...
Page 55
... surface , each triangle is in a different plane ; they must therefore be reduced by computation to what they would have been , had they been measured on the surface of the sea ; and as the earth may in this case be esteemed spherical ...
... surface , each triangle is in a different plane ; they must therefore be reduced by computation to what they would have been , had they been measured on the surface of the sea ; and as the earth may in this case be esteemed spherical ...
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Common terms and phrases
absorb action appears atmosphere attraction bodies caloric calorific rays cause centre chemical chemical decomposition colours comet compression computed consequently currents decrease degree density diameter diminishes direction distance disturbing double stars earth ecliptic effects elastic electric currents electricity ellipse equal equator extremely fluid force galvanometer glass globe gravitation greater height Herschel increase intensity Jupiter latent heat latitude length less liquid longitude lunar magnetic mass mean motion meridian miles moon nearly needle node nutation observed occasions ocean orbit oscillations parallax particles passing perigee perihelion period phenomena planets plate polarized poles position prism probably produce quantity radiation rays of light reflected refraction revolution revolve right angles rotation satellites Saturn sensible Sir Edward Parry solar solid sound space spectrum spheroid square stars substances sun's surface temperature terrestrial tides tion tourmaline transmitted tricity undulations Uranus variations velocity vibrations voltaic waves whence wire
Popular passages
Page 29 - ... that the mean longitude of the first satellite, minus three times that of the second, plus twice that of the third, is always equal to two right angles.
Page 18 - Kepler's law, of the squares of the periodic times being proportional to the cubes of the mean distances of the planets from the sun, that one cannot vary without affecting the other.
Page 137 - Willis on the mechanism of the larnyx, it may be presumed that ultimately the utterance or pronunciation of modern languages will be conveyed, not only to the eye, but also to the ear, of posterity. Had the ancients possessed the means of transmitting such definite sounds, the civilized world would still have responded in sympathetic notes at the distance of hundreds of ages.
Page 21 - that must render the name for ever memorable in science, and revered by those who delight in the contemplation of whatever is excellent and sublime." After Newton's discovery of the mechanical laws of the elliptical orbits of the planets, La Grange's discovery of their periodical inequalities is, without doubt, the noblest truth in physical astronomy ; and, in respect of the doctrine of final causes, it may be regarded as the greatest of all.
Page 302 - These formulae, emblematic of Omniscience, condense into a few symbols the immutable laws of the universe. This mighty instrument of human power itself originates in the primitive constitution of the human mind, and rests upon a few fundamental axioms, which have eternally existed in Him who implanted them in the breast of man when He created him after His own image.
Page 276 - Jupiter ; it then gradually diminished in splendor, and having exhibited all the variety of tints that indicate the changes of combustion, vanished sixteen months after its discovery, without altering its position. It is impossible to imagine anything more tremendous than a conflagration that could be visible at such a distance.
Page 106 - D'Alembert, was the Precession of the equinoxes and the Nutation of the earth's axis, according to the theory of gravitation.
Page 252 - The steel magnet is stationary ; but when the armature, together with its appendages, is made to rotate horizontally, the edge of the disc always remains immersed in the mercury, while the points of the copper slip alternately dip in it and rise above it. By the ordinary laws of induction, the armature becomes a temporary magnet while its bent ends are opposite the poles of the steel magnet, and ceases to be magnetic when they are at right angles to them. It imparts its temporary magnetism to the...
Page 275 - Nothing is known of the absolute magnitude of the fixed stars, but the quantity of light emitted by many of them shows that they must be much larger than the sun.
Page 246 - ... that is, in the plane which passes through the north and south magnetic poles. There are places where the magnetic meridian coincides with the terrestrial meridian ; in these a magnetic needle freely suspended, points to the true north, but if it be carried successively to different places on the earth's surface, its direction will deviate sometimes to the east and sometimes to the west of north. Lines drawn on the globe through all the places where the needle points due north and south, are...