- Negation, 44.
- Negative arguments, 621.
- Negative density, 642.
- Negative premises, 63, 103.
- Negative propositions, 43.
- Negative results of experiment, 434.
- Negative terms, 14, 45, 54, 74.
- Neil on use of hypothesis, 509.
- Neptune, discovery of, 537, 660.
- Newton, Sir Isaac, binomial theorem, 231;
- spectrum, 262, 418, 420, 424, 583;
- rings of, 288, 470;
- velocity of sound, 295;
- wave-lengths, 297;
- use of pendulum, 303;
- on time, 308;
- definition of matter, 316;
- pendulum experiment, 348, 443, 604;
- centrobaric bodies, 365;
- on weight, 422;
- achromatic lenses, 432;
- resistance of space, 435;
- absorption of light, 445;
- planetary motions, 249, 457, 463, 466, 467;
- infinitesimal calculus, 477;
- as an alchemist, 505;
- his knowledge of Bacon’s works, 507;
- hypotheses non fingo, 515;
- on vortices, 517;
- theory of colours, 518;
- corpuscular theory of light, 520;
- fits of easy reflection, &c., 523;
- combustible substances, 527;
- gravity, 555, 650;
- density of earth, 566;
- velocity of sound, 571;
- third law of motion, 622;
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