Bernoulli, James, on the centre of oscillation, 149.

Bernoulli, John, on the conservation of living force, 149; on the principle of virtual velocities, 151.

Bible, parallel pa.s.sages from, for language study, 356.

Binocular vision, 66 et seq.

Black, his theory of caloric, 138, 162; on quant.i.ty of heat, 166, 174; on latent heat, 167, 178; researches in heat generally, 244.

Blind cat, 303.

Bodies, heavy, seek their places, 224 et seq.; rotating, 285.

Body, a mental symbol for groups of sensations, 200-203; the human, our knowledge of, 90.

Boltzmann, 236.

Booth, Mr., 77.

Borelli, 217.

Boulder, a granite, 233.

Bow-wave of ships and moving projectiles, 323 et seq.

Boys, 317.

Bradley, 273.

Brahman, the, 63.

Brain, localisation of functions in, 210.

Breuer, 272, 282 et seq., 293, 298, 300, 301, 303, 306.

Brewster, his stereoscope, 73.

Bridge, invention of the, 264, 268.

British a.s.sociation, 108.

Brooklyn Bridge, 75, footnote.

Brown, Crum, 293, 301.

Building, our concepts directions for, 253; facts the result of, 253; science compared to, 257.

Building-stones, metrical units are, 253.

Busch, 328.

Business of a merchant, science compared to the, 16.

b.u.t.terfly, a, 22.

Calculating machines, their economical character, 196.

Caloric, theory of, stood in the way of scientific advancement, 138, 167.

Calypso, the island of, 351.

Canterbury, Archbishop of, 39.

Cantor, M., 361, footnote.

Capacity, electrical, 116 et seq., 123; thermal, 123; specific inductive, 117.

Capulets and Montagues, 87.

Cards, difficult games of, 357.

Carnot, S., excludes perpetual motion in heat, 156, 162; his mechanical view of physics, 156; on thermodynamics, 160 et seq.; his principle, 162; also, 191.

Carus, Dr. Paul, 265, footnote.

Ca.s.selli's telegraph, 26.

Ca.s.sini, 51.

Cauchy, character of the intellectual activity of a, 195.

Causal insight, awakened by science, 357.

Causality, 157-159, 190, 198 et seq., 221 et seq., 237, 253, 254.

Cause and effect, 198 et seq. See also Causality.

Centimetre-gramme-second system, 111.

Centre of gravity, must lie as low as possible for equilibrium to subsist, 15; Torricelli's principle of, 150 et seq.

Centre of oscillation, 149.

Change, method of, in science, 230.

Changeable character of bodies, 202.

Changes, physical, how they occur, 205.

Character, a Universal Real, 192.

Character, like the forms of liquids, 3; persons of, 24.

Charles the Fifth, 369.

Chemical, elements, 202; symbols, 192; current, 118.

Chemistry, character of research in, 255; the method of thermodynamics in, 257.

Child, a, modes of thought of, 223; looking into a moat, 208.

Child of the forest, his interpretation of new events, 218-219.

Childish questions, 199-200.

Children, the drawings of, 201-202.

Chinese language, economy of, 192; study of, 354.

Chinese philosopher, an old, 186.

Chinese, speak with unwillingness of politics, 374; the art of, 79-80.

Chosen, many are called but few are, 65.

Christ, saying of, 65.

Christianity, Latin introduced with, 311.

Christians and Jews, monotheism of the, 187.

Church and State, 88.

Cicero, 318.

Circe, 372.

Circle, the figure of least area with given periphery, 12.

Circular polarisation, 242.

Civilisation and barbarism, 335 et seq.

Civilisation, some phenomena of, explained by binocular vision, 74.

Civilised man, his modes of conception and interpretation, 219.

Clapeyron, 162.

Cla.s.s-characters of animals, 255.

Cla.s.sical, culture, the good and bad effects of, 347; scholars, not the only educated people, 345.

Cla.s.sics, on instruction in, 338-374; the scientific, 368.

Cla.s.sification in science, 255.

Clausius, on thermodynamics, 165; on reversible cycles, 176.

Claviatur, Mach's, 42-43.

Club-law, 335.

Cochlea, the, a species of piano-forte, 19.

c.o.c.kchafer, 86.

Coefficient of self-induction, 250, 252.

Colophonium, solution of, 7.

Color, acoustic, 36.

Color-sensation, 210.

Color-signs, their economy, 192.

Colors, origin of the names of, 239.

Column, body moving behind a, 202.

Communication, its functions, import and fruits, 197, 238 et seq.; by language, 237; high importance of, 191 et seq.

Comparative physics, 239.

Comparison in science, 231, 238 et seq.

Computation, a principle of Asthetics, 34.

Concepts, abstract, defined, 250-252; metrical, in electricity, 107 et seq.

Conceptual, meaning of the term, 240.

Conceptual thought, 192.

Concha, 18.

Condensers, electrical, 125 et seq. 132, footnote.