- First Aphorism, 219;
- on causes, 221;
- Copernican system, 249, 638;
- deficient powers of senses, 278;
- observation, 402;
- Natural History, 403;
- use of hypothesis, 506;
- his method, 507;
- experimentum crucis, 519;
- error of his method, 576;
- ostensive, clandestine instances, &c., 608, 610;
- latens precessus, 619.
- Bacon, Roger, on the rainbow, 526, 598.
- Baily, Francis, 272;
- density of earth, 342, 566;
- experiments with torsion balance, 370, 397, 432, 567–8;
- motions of stars, 572.
- Bain, Alexander, on powers of mind, 4;
- Mill’s reform of logic, 227.
- Baker’s poem, The Universe, 621.
- Balance, use of the chemical, 292, 351, 354, 369;
- delicacy of, 304;
- vibrations of, 369.
- Ballot, Buys, experiment on sound, 541.
- Ballot-box, simile of, 150, 251–6, 765.
- Barbara, 55, 57, 88, 105, 141.
- Baroko, 85.
- Barometer, 659;
- Gay Lussac’s standard, 346;
- variations, 337, 346, 349.
- Bartholinus on double refraction, 585.
- Base-line, measurement of, 304.
- Bauhusius, verses of, 175.
- Baxendell, Joseph, 552.
- Beneke, on substitution, 21.
- Bennet, momentum of light, 435.
- Bentham, George, 15;
- bifurcate classification, 695;
- infima species, 702;
- works on classification, 703;
- analytical key to flora, 712.
- Bentham, Jeremy, on analogy, 629;
- bifurcate classification, 703.
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