On the Connexion of the Physical SciencesJ. Murray, 1840 - 499 pages |
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Page xiii
... called Electricity of Tension . - Methods of exciting Bodies . Transference . - Electrics and Non - Electrics . - Law of its Intensity . Distribution . - Tension . - Electric Heat and Light.- Atmo- spheric Electricity- Its Cause ...
... called Electricity of Tension . - Methods of exciting Bodies . Transference . - Electrics and Non - Electrics . - Law of its Intensity . Distribution . - Tension . - Electric Heat and Light.- Atmo- spheric Electricity- Its Cause ...
Page 12
... called the ver- nal and autumnal equinoxes . The vernal equinox is the point through which the sun passes , in going from the southern to the northern hemisphere ; and the autumnal , that in which he crosses from the northern to the ...
... called the ver- nal and autumnal equinoxes . The vernal equinox is the point through which the sun passes , in going from the southern to the northern hemisphere ; and the autumnal , that in which he crosses from the northern to the ...
Page 13
... called the elements of the orbit . These are , the length of the major axis , and the excentricity , which determine the form of the orbit : the longitude of the planet when at its least distance from the sun , called the longitude of ...
... called the elements of the orbit . These are , the length of the major axis , and the excentricity , which determine the form of the orbit : the longitude of the planet when at its least distance from the sun , called the longitude of ...
Page 17
... called the ver- nal and autumnal equinoxes . The vernal equinox is the point through which the sun passes , in going from the southern to the northern hemisphere ; and the autumnal , that in which he crosses from the northern to the ...
... called the ver- nal and autumnal equinoxes . The vernal equinox is the point through which the sun passes , in going from the southern to the northern hemisphere ; and the autumnal , that in which he crosses from the northern to the ...
Page 17
... called the elements of the orbit . These are , the length of the major axis , and the excentricity , which determine the form of the orbit : the longitude of the planet when at its least distance from the sun , called the longitude of ...
... called the elements of the orbit . These are , the length of the major axis , and the excentricity , which determine the form of the orbit : the longitude of the planet when at its least distance from the sun , called the longitude of ...
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Common terms and phrases
absorbed action appears atmosphere attraction blue bodies caloric calorific rays cause centre centrifugal force chemical circular circular polarization colours comet consequently crystal degrees density diameter diminished direction distance disturbing earth ecliptic effects electricity equal equator ether excentricity extremely Fahrenheit Fcap fluid force glass gravitation greater heat Herschel horizon increase intensity Jupiter latent heat latitude length lines liquid longitude lunar magnetic major axis mass mean meridian miles moon motion move nearly nodal lines nodes Note nutation observations optic optic axis orbit oscillations parallax particles passing perigee perihelion period perpendicular phenomena planet plate polarized poles position prism produce quantity radiation reflected refraction refrangibility retrograde motion revolution revolving right angles rings rotation satellites sensible heat solid sound space stars stratum substances sun's surface takes place temperature terrestrial tion tourmaline transmitted tricity undulations Uranus variation velocity vibrations violet Voltaic waves white light
Popular passages
Page 36 - A singular law obtains among the mean motions and mean longitudes of the first three satellites. It appears from observation that the mean motion of the first satellite, plus twice that of the third, is equal to three times that of the second ; and 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. It is proved by theory, that if these relations had only been...
Page 399 - ... the firmament of large stars, into which the central cluster would be seen projected, and (owing to its greater distance) appearing like it to consist of stars much smaller than those in other parts of the heavens. "Can it be,'' asks Sir J. Herschel, " that we have here a brother system, bearing a real physical resemblance and strong analogy of structure to our own ?
Page 2 - The heavens afford the most sublime subject of study which can be derived from science. The magnitude and splendour of the objects, the inconceivable rapidity with which they move, and the enormous distances between them, impress the mind with some notion of the energy that maintains them in their motions, with a durability to which we can see no limit. Equally conspicuous is the goodness of the great First Cause, in having endowed man with faculties, by which he can not only appreciate the magnificence...
Page 421 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.
Page 28 - Omnipotent, and with his words All seem'd well pleas'd ; all seem'd, but were not all. That day, as other solemn days, they spent In song and dance about the sacred hill ; Mystical dance, which yonder starry sphere Of planets, and of fix'd, in all her wheels Resembles nearest, mazes intricate, Eccentrick, intervolv'd, 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. Evening now approach'd...
Page 25 - But, in the midst of all these vicissitudes, the length of the major axes and the mean motions of the planets remain permanently independent of secular changes. They are so connected by 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 iii - If I have succeeded in my endeavour to make the laws by which the material world is governed, more familiar to my countrywomen, I shall have the gratification of thinking, that the gracious permission to dedicate my book to your Majesty has not been misplaced.
Page 256 - ... miles in a second — a fragment of it alone reached the earth. The obliquity of the descent of meteorites, the peculiar substances they are composed of, and the explosion accompanying their fall, show that they are foreign to our system.
Page 51 - The variation, therefore, in the distances of the sun and moon from the centre of the earth, and of the moon from her node at the instant of conjunction, occasions great varieties in the solar eclipses. Besides, the height of the moon above the horizon changes her apparent diameter, and may augment or diminish the apparent distances of the centres of the sun and moon, so that an eclipse of the sun may occur to the inhabitants of one country, and not to those of another. In this respect the solar...
Page 213 - The spritsail yard and mizen boom w«re lighted by the reflection, as if gas lights had been burning directly below them; and until just before daybreak, at four o'clock, the most minute objects were distinctly visible. Day broke very slowly and the sun rose of a fiery and threatening aspect. Rain followed.