Part 56

Natural constants, 193.

Natural law, a, not contained in the conformity of the energies, 175.

Natural laws, abridged descriptions, 193; likened to type, 193.

Natural motions, 225.

Natural selection in scientific theories, 63, 218.

Nature, experience the well-spring of all knowledge of, 181; fashions of, 64; first knowledge of, instinctive, 189; general interconnexion of, 182; has many sides, 217; her forces compared to purposes, 14-15; likened to a good man of business, 15; the economy of her actions, 15; how she appears to other animals, 83 et seq.; inquiry of, viewed as a torture, 48-49; view of, as something designedly concealed from man, 49; like a covetous tailor, 9-10; magic powers of, 189; our view of, modified by binocular vision, 82; the experimental method a questioning of, 48.

Negro hamlet, the science of a, 237.

Neptune, prediction and discovery of the planet, 29.

New views, 296 et seq.

Newton, describes polarisation, 242; expresses his wealth of thought in Latin, 341; his discovery of gravitation, 225 et seq.; his solution of dispersion, 362; his principle of the equality of pressure and counterpressure, 191; his view of light, 227-228; on absolute time, 204; selections from his works for use in instruction, 368; also 270, 274, 279, 285, 289.

Nobility, they displace Latin, 342.

Notation, musical, mathematically illustrated, 103-104.

Numbers, economy of, 195; their connexion with consonance, 32.

Numerical mysticism, 33.

Nursery, the questions of the, 199.

Observation, 310.

Observation, in science, 261.

Ocean-stream, 272.

Oettingen, Von, 103.

Ohm, on electric currents, 249.

Ohm, the word, 343.

Oil, alcohol, water, and, employed in Plateau's experiments, 4; free mass of, assumes the shape of a sphere, 12; geometrical figures of, 5 et seq.

One-eyed people, vision of, 98.

Ophthalmoscope, 18.

Optic nerves, 96.

Optimism and pessimism, 234.

Order of physics, 197.

Organ, bellows of an, 135.