On the Connexion of the Physical SciencesJ. Murray, 1834 - 458 pages |
From inside the book
Page 27
... satellites . Although the two first satellites sensibly move in circles , they acquire a small ellipticity from the perience . disturbances they ex- The orbits of the satellites do not retain a per- manent inclination either to the ...
... satellites . Although the two first satellites sensibly move in circles , they acquire a small ellipticity from the perience . disturbances they ex- The orbits of the satellites do not retain a per- manent inclination either to the ...
Page 28
... satellites , must occasion a change in the direc- tions and intensities of the forces , which will affect the motions and orbits of the satellites . this reason the secular variations in the eccentricity of Jupiter's orbit , occasion ...
... satellites , must occasion a change in the direc- tions and intensities of the forces , which will affect the motions and orbits of the satellites . this reason the secular variations in the eccentricity of Jupiter's orbit , occasion ...
Page 29
... satellites are too small to be mea- sured , yet their perturbations give the values of their masses with ... satellites . It appears from observation that the mean motion of the first satellite , plus twice that of the third , is equal ...
... satellites are too small to be mea- sured , yet their perturbations give the values of their masses with ... satellites . It appears from observation that the mean motion of the first satellite , plus twice that of the third , is equal ...
Page 30
... satellites vanish and reappear on the same side of the disc . These eclipses are in all respects similar to those of the moon ; but , occasionally , the sa- tellites eclipse Jupiter , passing like black spots across his surface , and ...
... satellites vanish and reappear on the same side of the disc . These eclipses are in all respects similar to those of the moon ; but , occasionally , the sa- tellites eclipse Jupiter , passing like black spots across his surface , and ...
Page 31
... satellite , which happen when Jupiter is near conjunction , are later by 16m 26 than those which take place when the planet is in opposition . But , as Jupiter is nearer to us when in opposition by the whole breadth of the earth's orbit ...
... satellite , which happen when Jupiter is near conjunction , are later by 16m 26 than those which take place when the planet is in opposition . But , as Jupiter is nearer to us when in opposition by the whole breadth of the earth's orbit ...
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Common terms and phrases
action appears atmosphere attraction caloric cause celestial bodies centre centrifugal force chemical decomposition colours comet compression consequently degree density diameter diminishes direction distance disturbing earth ecliptic effect electric currents equal equator equilibrium equinox ether excentricity extremely fluid force galvanometer glass globe gravitation heat increase induction inequalities intensity Jupiter latent heat latitude length liquid longitude lunar magnetic major axis mass mean motion meridian miles moon nearly nebulæ needle nodes nutation observed occasions ocean opposite optic optic axis orbit oscillations parallax particles passing perigee perihelion period perpendicular phenomena plane plate poles position produce proved quantity ray of light reflected refraction revolution revolve right angles rings rotation satellites Saturn secular Sir Edward Parry solar sound space spheroid substances sun and moon sun's surface temperature terrestrial theory tides tion tourmaline transmitted tricity undulations variation 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 20 - In song and dance about the sacred Hill — Mystical dance, which yonder starry sphere Of planets and of fixed in all her wheels Resembles nearest; mazes intricate, Eccentric, intervolved, yet regular Then most when most irregular they seem; And in their motions harmony divine So smooths her charming tones that God's own ear Listens delighted.
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 386 - 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 110 - D'Alembert, was the Precession of the equinoxes and the Nutation of the earth's axis, according to the theory of gravitation.
Page 310 - ... 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...
Page 357 - Hence arises still further confirmation, if any were required, of the identity of common and voltaic electricity, and that the differences of intensity and quantity are quite sufficient to account for what were supposed to be their distinctive qualities.
Page 175 - ... follows, that the orange and green rays of the spectrum, though they cannot be decomposed by prismatic refraction, can be decomposed by absorption, and actually consist of two different colours possessing the same degree of refrangibility.
Page 51 - ... solid parts, by their cohesion, nearly destroy that part of the centrifugal force which gives the particles a tendency to accumulate at the equator, though not altogether ; otherwise the sea, by the superior mobility of its particles, would flow towards the equator and leave the poles dry. Besides, it is well known, that the continents at the equator are more elevated than they are in higher latitudes. It is also necessary for the equilibrium of the ocean, that its density should be less than...