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index to the principia.
577
| Force, centripetal force defined, | 74 | |
| “ | the absolute quantity of centripetal force defined, | 75 |
| “ | the accelerative quantity of the same defined, | 76 |
| “ | the motive quantity of the same defined, | 76 |
| “ | the proportion thereof to any known force how collected, | 109 |
| “ | a centripetal force that is reciprocally as the cube of the ordinate tending to a vastly remote centre of force will cause a body to move in any given conic section, | 114 |
| “ | a centripetal force that is as the cube of the ordinate tending to a vastly remote centre of force will cause a body to move in an hyperbola, | 243 |
| “ | centrifugal force of bodies on the earth s equator, how great, | 405 |
| God, his nature, | 506 | |
| Gravity mutual between the earth and its parts, | 94 | |
| “ | of a different nature from magnetical force, | 397 |
| “ | the cause of it not assigned, | 507 |
| “ | tends towards all the planets, | 393 |
| “ | from the surfaces of the planets upwards decreases in the duplicate ratio of the distances from the centre, | 400 |
| “ | from the same downwards decreases nearly in the simple ratio of the same, | 400 |
| “ | tends towards all bodies, and is proportional to the quantity of matter in each, | 397 |
| “ | is the force by which the moon is retained in its orbit, | 391 |
| “ | the same proved by an accurate calculus, | 453 |
| “ | is the force by which the primary planets and the satellites of Jupiter and Saturn are retained in their orbits, | 393 |
| Heat, an iron rod increases in length by heat, | 412 | |
| “ | of the sun, how great at different distances from the sun, | 486 |
| “ | how great in Mercury, | 400 |
| “ | how great in the comet of 1680, when in its perihelion, | 486 |
| Heavens are void of any sensible resistance, 401, 445, 492; and, therefore, of almost any corporeal fluid whatever, | 355, 356 | |
| “ | suffer light to pass through them without any refraction, | 485 |
| Hydrostatics, the principles thereof delivered, | 293 | |
| Hyperbola, by what law of centrifugal force tending from the centre of the figure it is described by a revolving body, | 116 | |
| “ | by what law of centrifugal force tending from the focus of the figure it is described by a revolving body, | 117 |
| “ | by what law of centripetal force tending to the focus of the figure it is described by a revolving body, | 118 |
| Hypotheses of what kind soever rejected from this philosophy, | 508 | |
| Jupiter, its periodic time, | 388 | |
| “ | its distance from the sun, | 388 |
| “ | its apparent diameter, | 386 |
| “ | its true diameter, | 399 |
| “ | its attractive force, how great, | 398 |
| “ | the weights of b dies on its surface, | 399 |
| “ | its density, | 399 |
| “ | its quantity of matter, | 399 |
| “ | its perturbation by Saturn, how much, | 403 |
| “ | the proportion of its diameters exhibited by computation, | 409 |
| “ | and compared with observations, | 409 |
| “ | its rotation about its axis, in what time performed, | 409 |
| “ | the cause of its belts hinted at, | 445 |
| Light, its propagation not instantaneous, | 246 | |
| “ | its velocity different in different mediums, | 245 |
| “ | a certain reflection it sometimes suffers explained, | 245 |
| “ | its refraction explained, | 243 |
| “ | refraction is not made in the single point of incidence, | 247 |
| “ | an incurvation of light about the extremities of bodies observed by experiments, | 246 |
| “ | not caused by the agitation of any ethereal medium, | 368 |
| Magnetic force, | 94, 304, 397, 454 | |
