Commentaries on the Principia of sir Isaac Newton respecting his theory ... of the gravitation of the planets, by the author of 'A new theory of gravitation'.1846 |
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Página 3
... analogy of the velocities to the distances from Kepler's Analogy . ) Taking the esti- mated distances of the planets to be true , and their orbits to be circular ( which they are , nearly ) , I easily computed their re- spective ...
... analogy of the velocities to the distances from Kepler's Analogy . ) Taking the esti- mated distances of the planets to be true , and their orbits to be circular ( which they are , nearly ) , I easily computed their re- spective ...
Página 4
... analogy derived from Kepler's is conformable to the observed pheno- mena , both analogies became more fully established . It subsequently occurred to me that the gravitating forces of the planets must be as their velocities ; and ...
... analogy derived from Kepler's is conformable to the observed pheno- mena , both analogies became more fully established . It subsequently occurred to me that the gravitating forces of the planets must be as their velocities ; and ...
Página 5
Joseph Denison. been determined by Kepler's Analogy , and from these data we may determine the cen- trifugal and centripetal forces in the follow- ing manner : - Taking the earth , for in- stance , at any point E of its orbit considered ...
Joseph Denison. been determined by Kepler's Analogy , and from these data we may determine the cen- trifugal and centripetal forces in the follow- ing manner : - Taking the earth , for in- stance , at any point E of its orbit considered ...
Página 58
... analogy of the periodic times to the distances and veloci- ties of the planets . It is indeed an im- portant ... Kepler's Analogy , T : :: D3 : d3 ; and dividing the last two terms by D and d , T2 : 12 2 : 1 :: 2 : d2 d 1 X : D and ...
... analogy of the periodic times to the distances and veloci- ties of the planets . It is indeed an im- portant ... Kepler's Analogy , T : :: D3 : d3 ; and dividing the last two terms by D and d , T2 : 12 2 : 1 :: 2 : d2 d 1 X : D and ...
Página 64
... analogies is demon- strated in the Principia , but they are both left for the reader to infer them , or to de- monstrate them for himself . The first inference may be demonstrated from Kepler's analogy , as follows : - T : t :: D : da ...
... analogies is demon- strated in the Principia , but they are both left for the reader to infer them , or to de- monstrate them for himself . The first inference may be demonstrated from Kepler's analogy , as follows : - T : t :: D : da ...
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Commentaries on the Principia of Sir Isaac Newton Respecting His Theory ... Joseph Denison Sin vista previa disponible - 2020 |
Commentaries On the Principia of Sir Isaac Newton Respecting His Theory ... Joseph Denison Sin vista previa disponible - 2023 |
Commentaries on the Principia of Sir Isaac Newton Respecting His Theory ... Joseph Denison Sin vista previa disponible - 2016 |
Términos y frases comunes
A B and A D aphelion approach arc A C B arcs described arcs directly areas A B D centre centri centrifugal force centripetal forces chord circle circular Commentaries Corol demon described in equal duplicate ratio earth elliptical orbit enunciated and demonstrated Euclid evanescent quantities existing quantities force of gravitation forces are inversely further planet gravitating forces homologous sides hypothesis impulse inference Kepler's Analogy length line A D mean distances monstrated nascent and evanescent nearer planet Newton Newton's theory obvious ordinates D B periodic petal forces pheno Principia Prop R A D radii inversely radius ratio compounded ratio of equality rectilinear areas remote points revolving body rollary scholium seventh lemma simple ratio Sir Isaac Newton sixth Corollary square-roots squares strate stration subduplicate ratio tances tangent tical triangles ultimate ratio vanish velocities versed sines wherefore
Pasajes populares
Página 36 - LEMMA X. THE SPACES WHICH A BODY DESCRIBES BY ANY FINITE FORCE URGING IT, WHETHER THAT FORCE IS DETERMINED AND IMMUTABLE, OR IS CONTINUALLY AUGMENTED OR CONTINUALLY DIMINISHED, ARE IN THE VERY BEGINNING OF THE MOTION ONE TO THE OTHER IN THE DUPLICATE RATIO OF THE TIMES. Let the times be represented by the lines AD, AE, and the velocities generated in those times by the ordinates DB, EC.
Página 46 - Join SC, and, because SB and Cc are parallel, the triangle SBC will be equal to the triangle SBc, and therefore also to the triangle SAB. By the like argument, if the centripetal force acts successively in C, D...
Página 26 - BF parallel to the tangent, always cutting any right line AF passing through A in F, this line BF will be ultimately in the ratio of equality with the evanescent arc ACB; because, completing the parallelogram AFBD, it is always in a ratio of equality with AD. COR. 2. And if through B and A more right lines are drawn, as BE, BD, AF, AG, cutting the tangent AD and its parallel BF; the ultimate ratio of all the abscissas AD, AE, BF, BG, and of the chord and arc AB, any one to any other, will be the...
Página 47 - SAFS, of those areas, are one to the other as the times in which they are described. Now let the number of those triangles be augmented, and their breadth diminished in infinitum; and (by Cor.
Página 45 - THE AREAS, WHICH REVOLVING BODIES DESCRIBE BY RADII DRAWN TO AN IMMOVABLE CENTRE OF FORCE DO LIE IN THE SAME IMMOVABLE PLANES, AND ARE PROPORTIONAL TO THE TIMES IN WHICH THEY ARE DESCRIBED.
Página 46 - E, &c., and makes the body, in each single particle of time, to describe the right lines CD, DE, EF, &c. , they will all lie in the same plane; and the triangle SCD will be equal to the triangle SBC, and SDE to SCD, and SEF to SDE. And therefore, in equal times, equal areas are described in one immovable plane: and, by composition, any sums SADS, SAFS, of those areas, are one to the other as the times in which they are described.
Página 27 - RAD, and the points A and B approach and meet, I say that the ultimate form of these evanescent triangles is that of similitude, and their ultimate ratio that of equality.
Página 91 - That the squares of the times of the revolutions of the planets are as the cubes of their mean distances from the sun.
Página 46 - THE TIMES IN WHICH THEY ARE DESCRIBED. For suppose the time to be divided into equal parts, and in the first part of that time let the body by its innate force describe the right line AB. In the second part of that time, the same would (by Law...
Página 82 - ... 72333, 38710. Their distances, according to Kepler and Bullialdus, scarcely differ by any sensible quantity, and where they differ most the distances drawn from the periodic times fall in between them. That the circum-terrestrial force likewise decreases in the duplicate proportion of the distances, I infer thus. The mean distance of the moon from the centre of the earth, is, in semi-diameters of the earth, according to...