Pierre le Pélérin, 12 Pile, 205 Pivoted compass, 9 Plagiarism, 63 Planta, Martin de, 74 Plato, 1, 213 Pliny, 4 Poet and scientist, 323 Poem, Mathematical, 364 Poggendorff, 276, 284, 375 Pohl, 276 Poincaré, 344 Polaric, 24 Polarity, 4, 200 Polarization, 200 Polyhedrons, 244 Pope Alexander VI., 24; Clement IV., 10; Paul III., 54; Leo X., 215 Popularization of science, 350 Porta, 215 Positive, 126 Potential, 70 Potato, 174 Pouillet, 284 Power, Feeble directive, 51 Preece, Sir William, 107 Premonstratensian Order, 107 Premonition, 266 Priestley, 106, 121, 167, 171, 231 Pringle, Sir John, 101 Priority in discoveries, 133 Prometheus, Modern, 119 Providence, 327; particular, general, 127 Pseudodoxia Epidemica, 70 Psychology, 246 Ptolemy, 54 Q Quacks, 52 Quackery, 149 R Radowitz, General, 278 Rainbow, 333 Ramsay, Sir Wm., 369 Ramsden, 74 Rayleigh, Lord, 388 Raymond Lully, 10 Reid, 368 Religion, 129 Republic, Cis-Alpine, 156 Repulsion, Magnetic, 2 Resurrection, 129 Retina, 348 Richet, 246 Richmann, 106 Righi, 71 Ritter, 224 Robespierre, 114 Roentgen, 211 Romagnosi, 206 Ronaldo, 219 Ross, Sir James, 30 Rotch, 104 Rousseau, 238 Rowland, 94 Rush, Benjamin, 165 S Sacchetti, 153 Samothracian rings, 3 Saturn's Rings, 339 Scarpa, 137 Schelling, 224 Schiller, 223 Schlegel, 223 Schweigger, 273 Science and free will, 352; and religion, 185; classification of, 252; experimental, 37; high priest of, 295 Sebec, 281 Secular variation, 49 Semi-circular canals, 138 Senses, Seven, 387 Series, 90 Seventh Sense, 387 Shakespeare's Cliff, 329 Siena, Cathedral, 115 Siger, 17 Silurus electricus, 150 Siphon-recorder, 375 Skill, Mechanical, 273 Smith's Prize, 336, 365 Snell, 244 Sophocles, 355 Soundings of deep sea, 384 Sound, Perception of, 282 Southey, 8 Spectator, 215 Spence, Dr., 82 Sphere, Electrified, 198 Spirit of mathematical analysis, 262 Squaring of the circle, 243 Saint Aloysius, 134; Augustine, 53, 254; Francis, Third Order of, 161; Thomas, 63 Saint-Hilaire, Geoffroy, 252 Statics, 199 Stereoscope, Real image, 348 Stethoscope, 139 Stevin, 49 Stewart, Balfour, 388 Stimmen aus Maria-Laach, 177 Stokes, 364 Stoney, 388 Strada, 216 Strain in the ether, 356 Structure of physical bodies, 282 Stuber, Dr., 119 Sturgeon, 70 Sugar from beet-root, 306 Sulzer, 176 Superfluous, Elimination of, 283 Suspension of the earth, 60 Swammerdam, 144 T Taisnier, 26, 63 Tait, 334, 337, 342 Tampering with the lodestone, 6 Tandem, 90 Taprobane, 5 Tasso, 166, 235 Taylor's scientific memoirs, 276 Telephone, 70 Terrella, 44 Terrestrial magnetism, 51 Terror, Reign of, 201 Test-nail method, 44 Text-books, Maxwell's, 349 Thales, 2 Theory of induction, 314; of the Leyden-jar, 88; two-fluid, 126 Thévenot, 20 Thimble-cell, 379 Thompson, James, 362; Silvanus P., 27, 63, 80, 371; Wm., 361 Thunderbolt, 117 Toaldo, Padre, 115