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 5
... earth , for in- stance , at any point E of its orbit considered circular , to be at the distance of 96,000,000 miles from s , B the centre of the sun , she would in 365 4 = 91.25 days , arrive at the point e , after describing one ...
... earth , for in- stance , at any point E of its orbit considered circular , to be at the distance of 96,000,000 miles from s , B the centre of the sun , she would in 365 4 = 91.25 days , arrive at the point e , after describing one ...
Página 6
... earth , and in like manner I determined the gravitating forces of the other known primary planets in the solar system . I then proceeded to compare these forces with their mean distances from the sun , with a view to discover whether ...
... earth , and in like manner I determined the gravitating forces of the other known primary planets in the solar system . I then proceeded to compare these forces with their mean distances from the sun , with a view to discover whether ...
Página 18
... earth , the inhabitable parts of which are situate principally in its northern hemisphere ; and the earth being in aphelion about Midsummer , and in peri- helion about the 1st of January , it is ob- vious that the intensity of heat in ...
... earth , the inhabitable parts of which are situate principally in its northern hemisphere ; and the earth being in aphelion about Midsummer , and in peri- helion about the 1st of January , it is ob- vious that the intensity of heat in ...
Página 19
... earth's orbit . I may add , in concluding this introduc- tion , that it follows from what has been observed , that the original initiatory cen- trifugal impulse given to each planet , was different from the one given to each of the ...
... earth's orbit . I may add , in concluding this introduc- tion , that it follows from what has been observed , that the original initiatory cen- trifugal impulse given to each planet , was different from the one given to each of the ...
Página 82
... earth is , in semidiameters of the earth , according to Ptolemy , Kepler in his Ephemerides , Bullialdus , Hevelius , and Ricciolus , 59 ; according to Flamstead , 59 ; according to Tycho , 56 ; to Ven- delin , 60 ; to Copernicus , 601 ...
... earth is , in semidiameters of the earth , according to Ptolemy , Kepler in his Ephemerides , Bullialdus , Hevelius , and Ricciolus , 59 ; according to Flamstead , 59 ; according to Tycho , 56 ; to Ven- delin , 60 ; to Copernicus , 601 ...
Otras ediciones - Ver todas
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...