The Connection of the Physical SciencesKey and Biddle, 1834 - 356 pages |
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Page 65
... Herschel from their relative brightness . He observed that they al- ternately exceed each other in brilliancy , and , by compar- ing the maxima and minima of their illumination with their positions relatively to the sun and to their ...
... Herschel from their relative brightness . He observed that they al- ternately exceed each other in brilliancy , and , by compar- ing the maxima and minima of their illumination with their positions relatively to the sun and to their ...
Page 117
... Herschel , in his admirable Treatise on Sound , thus explains the phenomenon . It is obvious , he says , ' that sound as well as light must be obstructed , stifled , and dissipated from its original direction by the mixture of air of ...
... Herschel , in his admirable Treatise on Sound , thus explains the phenomenon . It is obvious , he says , ' that sound as well as light must be obstructed , stifled , and dissipated from its original direction by the mixture of air of ...
Page 120
... Herschel is of opinion , that an intensely prolonged peal is probably owing to a combination of sounds , because the velocity of electricity being incomparably greater than that of sound , the thunder may be regarded as originating in ...
... Herschel is of opinion , that an intensely prolonged peal is probably owing to a combination of sounds , because the velocity of electricity being incomparably greater than that of sound , the thunder may be regarded as originating in ...
Page 153
... extraordinary property of its polari- zation , ' the phenomena of which , ' Sir John Herschel says , ' are so singular and various , that to one who has only studied the common branches of physical optics , it is PHYSICAL SCIENCES . 153.
... extraordinary property of its polari- zation , ' the phenomena of which , ' Sir John Herschel says , ' are so singular and various , that to one who has only studied the common branches of physical optics , it is PHYSICAL SCIENCES . 153.
Page 166
... Herschel observes , a piece of window - glass or a polished table to polarize the light , a sheet of clear ice to produce the rings , and a broken fragment of plate - glass placed near the eye to analyze the light , are alone requisite ...
... Herschel observes , a piece of window - glass or a polished table to polarize the light , a sheet of clear ice to produce the rings , and a broken fragment of plate - glass placed near the eye to analyze the light , are alone requisite ...
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Common terms and phrases
action appears astronomers atmosphere attraction caloric cause celestial bodies centre centrifugal force chemical decomposition colors comet compression consequently degree density diameter diminishes direction disturbing earth ecliptic effect electric currents equal equator equilibrium equinox ether extremely fluid force galvanometer glass globe gravitation heat Herschel increase inequalities intensity Jupiter Key & Biddle latent heat latitude length liquid longitude lunar magnetic major axis mass mean motion meridian miles moon nearly needle nodes nutation observed ocean opposite optic axis orbit oscillations parallax particles passing perigee perihelion period perpendicular phenomena plane plate poles position produce proved quantity ray of light reflected refraction retrograde motion revolution revolve right angles rings rotation satellites sensible 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 20 - 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 fixed, in all her wheels Resembles nearest, mazes intricate, Eccentrick, 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 316 - Bacon, that the words of prophecy are to be interpreted as the words of one 'with whom a thousand years are as one day, and one day as a thousand years.
Page 10 - Kepler also deduced from observation, that the squares of the periodic times of the planets, or the times of their revolutions round the sun, are proportional to the cubes of their mean distances from...
Page 28 - His true position is in the diagonal of the parallelogram, whose sides are in the ratio of the velocity of light to the velocity of the earth in its orbit, which is as 190000 to 19.
Page 298 - Jupiter ; it then gradually diminished in splendour, 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 296 - The distance of the fixed stars is too great to admit of their exhibiting a sensible disc ; but, in all probability, they are spherical, and must certainly be so if gravitation pervades all space, which it may be presumed to do, since Sir John Herschel has shown that it extends to the binary systems of stars.
Page 318 - 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.