- conformity with, 516.
- Fallacies, 62;
- analysed by indirect method, 102;
- of observation, 408.
- Faraday, Michael, measurement of gold-leaf, 296;
- on gravity, 342, 589;
- magnetism of gases, 352;
- vibrating plate, 419;
- electric poles, 421;
- circularly polarised light, 424, 588, 630;
- freezing mixtures, 427;
- magnetic experiments, 431, 434;
- lines of magnetic force, 446, 580;
- errors of experiment, 465;
- electrolysis, 502;
- velocity of light, 520;
- prediction, 543;
- relations of physical forces, 547;
- character of, 578, 587;
- ray vibrations, 579;
- mathematical power, 580;
- philosophic reservation of opinion, 592;
- use of heavy glass, 609;
- electricity, 612;
- radiant matter, 642;
- hydrogen, 691.
- Fatality, belief in, 264.
- Ferio, 56.
- Figurate numbers, 183, 186.
- Figure of earth, 459, 565.
- Fizeau, use of Newton’s rings, 297, 582;
- fixity of properties, 313;
- velocity of light, 441, 561.
- Flamsteed, use of wells, 294;
- standard stars, 301;
- parallax of pole-star, 338;
- selection of observations, 358;
- astronomical instruments, 391;
- solar eclipses, 486.
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