- certainty of, 267.
- Giffard’s injector, 536.
- Gilbert, on rotation of earth, 249;
- magnetism of silver, 431;
- experimentation, 443.
- Gladstone, J. H., 445.
- Glaisher, J. W. L., on mathematical tables, 331;
- law of error, 375, 395.
- Gold, discovery of, 413.
- Gold-assay process, 434.
- Gold-leaf, thickness of, 296.
- Graham, Professor Thomas, on chemical affinity, 614;
- continuity, 616;
- nature of hydrogen, 691.
- Grammar, 39;
- rules of, 31.
- Grammatical, change, 119;
- equivalence, 120.
- Gramme, 317.
- Graphical method, 492.
- Gravesande, on inflection of light, 420.
- Gravity, 422, 512, 514, 604, 740;
- determination of, 302;
- elimination of, 427;
- law of, 458, 462, 474;
- inconceivability of, 510;
- Newton’s theory, 555;
- variation of, 565;
- discovery of law, 581;
- Faraday on, 589;
- discontinuity in, 620;
- Aristotle on, 649;
- Hooke’s experiment, 436.
- Grimaldi on the spectrum, 584.
- Grove, Mr. Justice, on ether, 514;
- electricity, 615.
- Guericke, Otto von, 432.
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