On the Connection of the Physical SciencesHarper & brothers, 1846 - 460 pàgines |
Des de l'interior del llibre
Resultats 1 - 5 de 100.
Pàgina vi
... Earth determined from it - Lunar , Solar , and Planetary Eclipses - Occultations and Lunar Distances - Mean Distance of the Sun from the Earth obtained from Lunar Theory - Abso- lute Distances of the Planets , how found Page 33 SECTION ...
... Earth determined from it - Lunar , Solar , and Planetary Eclipses - Occultations and Lunar Distances - Mean Distance of the Sun from the Earth obtained from Lunar Theory - Abso- lute Distances of the Planets , how found Page 33 SECTION ...
Pàgina ix
... Earth - Climate - Line of Perpetual Con- gelation - Causes affecting Climate - Isothermal Lines - Excessive Cli- mates - The same Quantity of Heat annually received and radiated by the Earth 238 SECTION XXVII . Influence of Temperature ...
... Earth - Climate - Line of Perpetual Con- gelation - Causes affecting Climate - Isothermal Lines - Excessive Cli- mates - The same Quantity of Heat annually received and radiated by the Earth 238 SECTION XXVII . Influence of Temperature ...
Pàgina 3
... earth with an accelerated velocity , and with a force proportional to their masses . By com- parison , Newton proved that the force which occasions the fall of bodies at the earth's surface is identical with that which retains the moon ...
... earth with an accelerated velocity , and with a force proportional to their masses . By com- parison , Newton proved that the force which occasions the fall of bodies at the earth's surface is identical with that which retains the moon ...
Pàgina 4
... earth . If the earth were a sphere , and at rest , a body would be equally attracted , that is , it would have the same weight at every point of its surface , because the surface of a sphere is everywhere equally distant from its center ...
... earth . If the earth were a sphere , and at rest , a body would be equally attracted , that is , it would have the same weight at every point of its surface , because the surface of a sphere is everywhere equally distant from its center ...
Pàgina 5
... earth's surface . The earth may therefore be regarded as the center of a force which extends to the moon ; and , as experience shows that the action and reaction of matter are equal and contrary ( N. 19 ) , the moon must attract the earth ...
... earth's surface . The earth may therefore be regarded as the center of a force which extends to the moon ; and , as experience shows that the action and reaction of matter are equal and contrary ( N. 19 ) , the moon must attract the earth ...
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Altres edicions - Mostra-ho tot
Frases i termes més freqüents
action appears atmosphere attraction bodies caloric cause centrifugal force chemical color comet computed consequently crystal degree density diameter diminishes direction disturbing earth ecliptic effect electricity equal equator ether extremely fluid galvanometer glass globe gravitation greater heat increase inequalities intensity Jupiter Jupiter's latitude length less light liquid longitude luminous lunar magnetic major axis mass mean distance mean motion meridian metal miles moon move nearly nodal lines nodes NOTE nutation observations ocean optic axis orbit oscillations parallax particles passing perigee perihelion periodic phenomena planet plate polarized poles position produce quantity rays reflected refraction refrangible retrograde motion revolution revolving right angles rings rotation satellites secular secular variation Sir John Herschel Sir William Herschel solar spectrum sound space square stars substances sun's surface temperature terrestrial theory tion tourmaline transmitted tricity undulations variation velocity vibrations Voltaic waves wire
Passatges populars
Pàgina 374 - a thousand years are as one day, and one day as a thousand years.
Pàgina 381 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
Pàgina 21 - 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...
Pàgina 407 - Whatever the reflecting surface may be, and however obliquely the light may fall upon it, the angle of reflection is always equal to the angle of incidence. Thus...
Pàgina 282 - The spark taken in the same manner from zinc, cadmium, tin, bismuth, and lead, in the melted state, gives similar results ; but the number, position, and colours of the lines vary in each case. The appearances are so different that, by this mode of examination, the metals may be readily distinguished from each other.
Pàgina 349 - Swan, which, after becoming invisible, reappeared, and having undergone many variations in light, vanished after two years, and has never since been seen. In 1572 a star was discovered in Cassiopeia, which rapidly increased in brightness till it even surpassed that of 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...
Pàgina 78 - about 30° eastward of the moon, where it is always high water both in the hemisphere where the moon is and in that which is opposite. On the west side of this circle the tide is flowing, on the east it is ebbing, and on every part of the meridian at 90° distant it is low water.
Pàgina 368 - ... of volcanic eruption. It has even been computed, that if a stone were projected from the moon in a vertical line, with an initial velocity of 10,992 feet in a second, — more than four times the velocity of a ball when first discharged from a cannon, — instead of falling back to the moon by the attraction of gravity, it would come within the sphere of the earth's attraction, and revolve about it like a satellite. These bodies, impelled either by the direction of the primitive impulse, or by...
Pàgina 221 - John thence concludes — 1st. That it is the heat of these rays, not their light, which operates the change ; 2ndly. That this heat possesses a peculiar chemical quality which is not possessed by the purely calorific rays outside of the visible spectrum, though far more intense ; and, 3rdly. That the heat radiated from obscurely hot iron, abounds especially in rays analogous to those of the region of the spectrum above indicated.
Pàgina 274 - ... were distinctly visible. Day broke very slowly, and the sun rose of a fiery and threatening aspect. Rain followed. Captain Bonnycastle caused a bucket of this fiery water to be drawn up ; it was one mass of light when stirred by the hand, and not in sparks as usual, but in actual coruscations.