On the Connexion of the Physical Sciences |
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Page 17
The motions of both are extremely slow ; it requires more than 114755 years for the major axis of the earth's orbit to accomplish a sidereal revolution , that is , to return to the same stars ; and 21067 years to complete its tropical ...
The motions of both are extremely slow ; it requires more than 114755 years for the major axis of the earth's orbit to accomplish a sidereal revolution , that is , to return to the same stars ; and 21067 years to complete its tropical ...
Page 23
But if the fixed stars , comets , or any unknown and unseen bodies , affect our sun and planets , the nodes of this plane will slowly recede on the plane of that immense orbit which the sun may , describe about some most distant centre ...
But if the fixed stars , comets , or any unknown and unseen bodies , affect our sun and planets , the nodes of this plane will slowly recede on the plane of that immense orbit which the sun may , describe about some most distant centre ...
Page 32
In fact , if the earth were at rest , rays from a star would pass along the axis of a telescope directed to it : but if ... aberration of the fixed stars , perfectly corresponds with that given by the eclipses of the first satellite .
In fact , if the earth were at rest , rays from a star would pass along the axis of a telescope directed to it : but if ... aberration of the fixed stars , perfectly corresponds with that given by the eclipses of the first satellite .
Page 46
... from the precision with which the longitude is determined by the occultations of stars and lunar distances . ... phenomenon of frequent occurrence : the moon seems to pass over the star , which almost instantaneously vanishes at one ...
... from the precision with which the longitude is determined by the occultations of stars and lunar distances . ... phenomenon of frequent occurrence : the moon seems to pass over the star , which almost instantaneously vanishes at one ...
Page 47
after a short time as suddenly reappears on the other ; and a lunar distance is the observed distance of the moon from the sun , or from a particular star or planet , at any instant . The lunar theory is brought to such perfection ...
after a short time as suddenly reappears on the other ; and a lunar distance is the observed distance of the moon from the sun , or from a particular star or planet , at any instant . The lunar theory is brought to such perfection ...
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according action angle appears arising atmosphere attraction axis becomes bodies cause centre changes colours comet consequently continued currents density depends determined diameter diminishes direction distance disturbing earth ecliptic effect electricity equal equator existence experiments extent extremely fluid force give given glass gravitation greater heat height increase influence intensity kind known latitude length less light liquid magnetic mass matter mean measured meridian miles moon motion move nature nearly needle object observed occasions ocean opposite orbit particles passing period phenomena plane plate polarized poles position probably produce proved quantity rays reflected refraction remain rest result revolve rings rotation round satellites seen side similar solar solid sound space square stars substances surface temperature terrestrial theory tides tion transmitted undulations variation varies vibrations waves whole 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...
Bibliographic information
| Title | On the Connexion of the Physical Sciences |
| Author | Mary Somerville |
| Publisher | J. Murray, 1834 |
| Original from | the New York Public Library |
| Digitized | 26 Jun 2006 |
| Length | 458 pages |
| Export Citation | BiBTeX EndNote RefMan |