- Hutton, density of earth, 566.
- Huxley, Professor Thomas, 764;
- on hypothesis, 509;
- classification, 676;
- mammalia, 682;
- palæontology, 682.
- Huyghens, theory of pendulum, 302;
- pendulum standard, 315;
- cycloidal pendulum, 341;
- differential method, 344;
- distant stars, 405;
- use of hypothesis, 508;
- philosophical method of, 585;
- on analogy, 639.
- Hybrids, 727.
- Hydrogen, expansion of, 471;
- refractive power, 527;
- metallic nature of, 691.
- Hygrometry, 563.
- Hypotheses, use of, 265, 504;
- substitution of simple hypotheses, 458;
- working hypotheses, 509;
- requisites of, 510;
- descriptive, 522, 686;
- representative, 524;
- probability of, 559.
- I
- Identical propositions, 119.
- Identities, simple, 37;
- partial, 40;
- limited, 42;
- simple and partial, 111;
- inference from, 51, 55.
- Identity, law of, 5, 6, 74;
- expression of, 14;
- propagating power, 20;
- reciprocal, 46.
Table of Contents
INDEX.
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