Popular scientific lectures Part 13

Conductors and non-conductors. See Electrical, etc.

Conformity in the deportment of the energies, 171-175.

Confusion of objects, cause of, 95.

Conic sections, 257.

Conical refraction, 29, 242.

Conservation of energy, 137 et seq. See Energy.

Conservation of weight or ma.s.s, 203.

Consonance, connexion of the simple natural numbers with, 33; Euclid's definition of, 33; explanation of, 42; scientific definition of, 44; and dissonance reduced to beats, 376, 370, 383.

Consonant intervals, 43.

Constancy of matter, 203.

Constant, the dielectric, 117.

Constants, the natural, 193.

Continuum of facts, 256 et seq.

Cornelius, 388, footnote.

Corti, the Marchese, his discovery of minute rods in the labyrinth of the ear, 19.

Coulomb, his electrical researches, 108, 109, 113; his notion of quant.i.ty of electricity, 173; his torsion-balance, 168.

Crew, Prof. Henry, 317, footnote.

Criticism, Socrates the father of scientific, 1, 16.

Critique of Pure Reason, Kant's, 188.

Crucible, derivation of the word, 49, footnote.

Crustacea, auditory filaments of, 29, 272, 302.

Cube of oil, 5.

Culture, ancient and modern, 344.

Currents, chemical, 118; electrical, 118; galvanic, 132; measurement of electrical, 135-136; of heat, 244, 249-250; strength of, 250.

Curtius, 356.

Curved lines, their asymmetry, 98.

Curves, how their laws are investigated, 206.

Cycles, reversible, Clausius on, 176.

Cyclical processes, closed, 175.

Cyclops, 67.

Cyclostat, 298.

Cylinder, of oil, 6; ma.s.s of gas enclosed in a, 179.

D'Alembert, on the causes of harmony, 34; his principle, 142, 149, 154; also 234, 279.

Danish schools, 338, footnote.

Darwin, his study of organic nature, 215 et seq.; his methods of research, 216.

Deaf and dumb, not subject to giddiness, 299.

Deaf person, with a piano, a.n.a.lyses sounds, 27.

Death and life, 186.

Definition, compendious, 197.

Deiters, 19.

Delage, 298, 301, 302.

Democritus, his mechanical conception of the world, 155, 187.

Demonstration, character of, 362.

Deportment of the energies, conformity in the, 171-175.

Derivation, laws only methods of, 256.

Descent, Galileo's laws of, 193; generally, 143 et seq., 204, 215.

Description, 108, 191, 236, 237; a condition of scientific knowledge, 193; direct and indirect, 240; in physics, 197, 199.

Descriptive sciences, their resemblance to the abstract, 248.

Determinants, 195.

Diderot, 234.

Dielectric constant, the, 117.

Difference-engine, the, 196.

Differential coefficients, their relation to symmetry, 98.

Differential laws, 204.

Differential method, for detecting optical imperfections, 317.

Diffraction, 91, 194.

Diffusion, Fick's theory of, 249.

Discharge of Leyden jars, 114 et seq.

Discoveries, the gist of, 270, 375.

Discovery and invention, distinction between, 269.

Dissonance, explanation of, 42; definition of, 33, 44. See Consonance.

Distances, estimation of, by the eye, 68 et seq.

Dogs, like tuning-forks, 23; their mentality, 190.

Domenech, AbbA, 92.

Dramatic element in science, 243.

Drop of water, on a greased plate, 8; on the end of a stick, 8; in free descent, 8.

Dubois, 218.

Dubois-Reymond, 370, footnote.

Dufay, 271.

Dynamics, foundations of, 153 et seq.

Ear, researches in the theory of, 17 et seq.; diagram of, 18; its a.n.a.lysis of sounds, 20 et seq.; a puzzle-lock, 28; reflected in a mirror, 93; no symmetry in its sensation, 103.

Earth, its oblateness not due to its original fluid condition, 2; rotation of, 204; internal disturbances of, 285.

Economical, nature of physical inquiry, 186; procedure of the human mind, 186; order of physics, 197; schematism of science, 206; tools of science, 207; coefficient of dynamos, 133.

Economy, of the actions of nature, 15; the purpose of science, 16; of language, 191 et seq.; of the industrial arts, 192; of mathematics, 195-196; of machinery, 196; of self-preservation, our first knowledge derived from, 197; generally, 186 et seq., 269.

Education, higher, 86; liberal, 341 et seq., 371.

Efflux, liquid, 150.

Ego, its nature, 234-235.

Egypt, 234.

Egyptians, art of, 78 et seq., 201.

Eighteenth century, the scientific achievements of, 187, 188.

Eleatics, on motion, 158.

Electrical, attraction and repulsion, 109 et seq., 168; capacity, 116 et seq.; force, 110, 119, 168; spark, 117, 127, 132, 133, 190; energy, measurement of, 128 et seq., 169; currents, conceptions of, 118, 132, 135-136, 226-227, 249, 250; fluids, 112 et seq., 228; pendulums, 110; levels, 173; potential, 121 et seq.; quant.i.ty, 111, 118, 119.

Electricity, as a substance and as a motion, 170; difference between the conceptions of heat and, 168 et seq., rAle of work in, 120 et seq.; galvanic, 134. See Electrical.

Electrometer, W. Thomson's absolute, 127, footnote.

Electrometers, 122, 127.

Electrostatic unit, 111.

Electrostatics, concepts of, 107 et seq.

Elements, interdependence of the sensuous, 179; of bodies, 202; of phenomena, equations between, 205; of sensations, 200; used instead of sensations, 208-209.

Ellipse, equation of, 205; the word, 342.

Embryology, possible future state of, 257.

Energies, conformity in the deportment of, 171-175; differences of, 175.

Energy, a metrical notion, 178; conservation of, 137 et seq.; defined, 139; metaphysical establishment of the doctrine of, 183; kinetic, 177; potential, 128 et seq.; substantial conception of, 164, 185, 244 et seq.; conservation of, in electrical phenomena, 131 et seq.; limits of principle of, 175; principle of, in physics, 160-166; sources of principle of, 179, 181; thermal, 177; Thomas Young on, 173.

Energy-value of heat, 178, footnote.

Enlightenment, the, 188.

Entropy, a metrical notion, 178.

Environment, stability of our, 206.

Equations for obtaining facts, 180; between the elements of phenomena, 205.

Equilibrium, conditions of, in simple machines, 151; figures of liquid, 4 et seq.; general condition of, 15; in the State, 15.

Etymology, the word, misused for entomology, 316.

Euclid, on consonance and dissonance, 33; his geometry, 364.