Unity of Purpose, Or Rational Analysis: Being a Treatise Designed to Disclose Physical Truths, and to Detect and Expose Popular ErrorsS.N. Dickinson & Company, 1846 - 292 páginas |
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Términos y frases comunes
a p of half allegation amount of force aphelion assumed at unity astronomy cause centre of gravity centripetal force circumference coincide commencing its fall conceive consequently cube deduced deflection denoted diameter distance 60 earth eccentric orbit ellipse equal equation error falling bodies force and motion force applied force expended force of gravity given space gravity is inversely half the sides half the square hence hypothesis Kepler law of falling law of gravity magnetic mean distance mean motion mean place moon moon's Newtonian law nutation observations odd numbers perihelion period phenomena planet revolving poles prime circle proportion quadrature quantities radius rate of convergency rate of force rate of gravity rate of motion rate or intensity reciprocal respect satellite Sir Isaac Newton solar system space passed square root star supposed surface tance tangent third power tides tion truth twice the sides unit of space varies inversely velocity Vince whole amount
Pasajes populares
Página 218 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
Página 267 - I then endeavoured to find out the cause of them. I was already convinced, that the apparent motion of the stars was not owing to a nutation of the earth's axis. The next thing that offered itself was an alteration in the direction of the plumb-line with which the instrument was constantly rectified...
Página 267 - At last I conjectured that all the phenomena, hitherto mentioned, proceeded from the progressive motion of light and the earth's annual motion in its orbit. For I perceived that, if light was propagated in time, the apparent place of a fixed object would not be the same when the eye is at rest, as when it is moving in any other direction than that of the line passing through the eye and object; and that when the eye is moving in different directions, the apparent place...
Página 26 - And I looked, and there was none to help; And I wondered that there was none to uphold : Therefore mine own arm brought salvation unto me; And my fury, it upheld me.
Página 248 - ... difference of attraction, in both cases, between the surface and the centre, which causes the lightness of the waters, and the consequent elevation. It will be seen, therefore, that, taking the whole earth into view, there are always two high tides diametrically opposite to each other, and two low tides also, midway between the high ones. The high tides are two great waves or swells, of small height, but extending each way through half a right angle. These waves follow the moon in its monthly...
Página 248 - XIT. 22 we have said with respect to the moon's influence in disturbing the level of the ocean, may be applied also to that of the sun; only, in the case of the sun, although its absolute action is about double that of the moon, yet, on account of its very great distance...
Página 265 - December, to the same situation it was in at that time twelve months, allowing for the difference of declination on account of the precession of the equinox. " This was a sufficient proof that...
Página 247 - Hence, for the same reason that a particle of water, on the side of the earth towards the moon, is drawn away from the centre, or has its downward tendency diminished, so the solid earth itself is drawn away from the mass of waters, on the side of the earth farthest from the moon. It is the difference of attraction, in both cases, between the surface and the centre, which causes the lightness of the waters, and the consequent elevation. It will be seen, therefore, that, taking the whole earth into...
Página 181 - D'Alembert, was the Precession of the equinoxes and the Nutation of the earth's axis, according to the theory of gravitation.
Página 267 - Object would not be the same when the Eye is at Rest, as when it is moving in any other Direction, than that of the Line passing through the Eye and Object ; and that, when the Eye is moving in different Directions, the apparent Place of the Object would be different.