- motions, 457;
- perturbations of, 657;
- classification, 683;
- system of, 748.
- Plants, classification of, 678.
- Plateau’s experiments, 427.
- Plato on science, 595.
- Plattes, Gabriel, 434, 438.
- Pliny on tides, 451.
- Plumb-line, divergence of, 461.
- Plurality, 29, 156.
- Poinsot, on probability, 214.
- Poisson, on principle of the inverse method, 244;
- work on Probability, 395;
- Newton’s rings, 470;
- simile of ballot box, 524.
- Polarisation, 653;
- discovery of, 530.
- Pole-star, 652;
- observations of, 366.
- Poles, of magnets, 365;
- of battery, 421.
- Political economy, 760.
- Porphyry, on the Predicables, 698;
- tree of, 702.
- Port Royal logic, 22.
- Positive philosophy, 760, 768.
- Pouillet’s pyrheliometer, 337.
- Powell, Baden, 623;
- on planetary motions, 660.
- Power, definition of, 224.
- Predicables, 698.
- Prediction, 536, 739;
- in science of light, 538;
- theory of undulations, 540;
- other sciences, 542;
- by inversion of cause and effect, 545.
- Premises, order of, 114.
- Prime numbers, 123, 139;
- formula for, 230.
- Principia, Newton’s, 581, 583.
Table of Contents
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