 I deduced that the forces which keep the Planets in their orbs must [be] reciprocally as the squares of their distances from the centers about which they revolve: and thereby compared the force requisite to keep the Moon in her orb with the force of gravity...  An Essay on Newton's "Principia" - الصفحة 7بواسطة Walter William Rouse Ball - 1893 - عدد الصفحات: 175عرض كامل - لمحة عن هذا الكتاب
 | Royal Society (Great Britain) - 1809 - عدد الصفحات: 792
...distances, as deduced by Sir Isaac Newton from the comparison of the motion of the heavenly bodies with the force of gravity at the surface of the earth ; and the analogy of nature will be preserved. 3. We may now therefore be allowed to admit this law ; and... | |
 | Thomas Curtis - 1829 - عدد الصفحات: 820
...distances, as deduced by Sir Isaac Newton from the comparison of the motion of the heavenly bodies with the force of gravity at the surface of the earth ; and the analogy of nature will be preserved. 3. We may now, therefore, be allowed to admit this law, and... | |
 | Arthur Berry - 1899 - عدد الصفحات: 578
...in their orbs must [be] reciprocally as the squares of their distances from the centers about which they revolve : and thereby compared the force requisite...earth, and found them answer pretty nearly. All this $$ 1 69, 17°] First Discoveries : Gravity 213 was in the two plague years of 1665 and 1666, for in... | |
 | Florian Cajori - 1899 - عدد الصفحات: 344
...halos.1 In 1666, " I began," he says, " to think of gravity extending to the orb of the moon, . . . and thereby compared the force requisite to keep the...of the earth, and found them answer pretty nearly." 2 The above thoughts on gravitation occurred to him while he was at his home in Lincolnshire, where... | |
 | Florian Cajori - 1899 - عدد الصفحات: 342
...halos.1 In 1666, " I began," he says, " to think of gravity extending to the orb of the moon, . . . and thereby compared the force requisite to keep the...of the earth, and found them answer pretty nearly." 2 The above thoughts on gravitation occurred to him while he was at his home in Lincolnshire, where... | |
 | Florian Cajori - 1899 - عدد الصفحات: 352
...halos.1 In 1666, "I began," he says, " to think of gravity extending to the orb of the moon, . . . and thereby compared the force requisite to keep the...surface of the earth, and found them answer pretty nearly."2 The above thoughts on gravitation occurred to him while he was at his home in Lincolnshire,... | |
 | Florian Cajori - 1899 - عدد الصفحات: 340
...halos.1 In 1666, "I began," he says, " to think of gravity extending to the orb of the moon, . . . and thereby compared the force requisite to keep the...surface of the earth, and found them answer pretty nearly."2 The above thoughts on gravitation occurred to him while he was at his home in Lincolnshire,... | |
 | Benjamin Harrow - 1920 - عدد الصفحات: 158
...to the ground, and found the forces to be identical! "I compared," he writes, "the force necessary to keep the moon in her orb with the force of gravity...of the earth, and found them answer pretty nearly." One and the same force pulls the moon and pulls the apple—the force of gravity. Further, the hypothesis... | |
 | Robert Henry Murray - 1921 - عدد الصفحات: 104
...the planets in their orb must be reciprocally as the squares of their distances from their centres ; and thereby compared the force requisite to keep the...and found them answer pretty nearly. All this was done in the two plague years of 1665 and 1666, for in those days I was in the prime of my age for invention,... | |
 | David Peck Todd - 1922 - عدد الصفحات: 420
...than other men, it is because I have been standing on the shoulders of giants." Elsewhere he says : "All this was in the two plague years of 1665 and 1666 [he was then but twentyfour], for in those days I was in the prime of my age for invention, and minded... | |
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