On the Connexion of the Physical Sciences

Undulation.

A wave. Undulatory theory. The mechanical principles of

the motion of waves.

Vapour. Steam.
Variation. A periodic inequality in the motion of

the moon.
Variation of the compass.

The deviation of the compass needle from the true north. Vertical. The direction of the plumb-line. Vertical plane. A plane passing through the plumbINDEX.

line, consequently at right angles to the horizon. Vesicles. Small hollow spheres of water. Vibration. A motion to and fro. Visual ray. A ray of light coming from any object

to the eye.

Volta-electric induction. The disposition of elec

tric currents to produce similar currents in bodies near them capable of receiving them.

ABERRATION of light, 31
Acceleration of the moon,

39
Action, compound and dis-

turbed, of the spheres, 12
Air, elasticity of, 90
Airy, Professor, 218, 225
Algæ, 279
Algol, the star, 388
Al the, 273
Amazons, river of the, 117
Andes, the, 134
Arabian science, 108
Arago, M., 135, 219, 266, 341
Arcs of the meridian, mea-

surement of, 54, 56
Asia, north-west basin of,

133
Astronomy, physical, 1; di-

visions of the science of,

68, 96
Astronomical tables, 68
Atmosphere, the, 123, 129,

130, 137, 163, 296
Attraction, its power uni.
versal, 1

and repulsion, elec-
trical, 291, 354

capillary, 123, 125

Aurora Borealis, 172, 299,

323
Axis of the earth, 59
Bacon, 33
Barometer, the, 131
Battery, voltaic, 304, 355

-, galvanic, 305
Biot, M., 214, 348
Birds, 283
Black, or Negro, 284
Bradley, Dr., 94
Cæsar, Julius, 100
Caloric, rays independent
of light, 228, 232

from all substances,
239

diffusion, 240

combustion, 241
Catalogue of stars by Her.

schel, 392
Celestial bodies how seen,

164; phenomena of re-
fraction,

atmos-
pheres of, 252
Centrifugal force opposed

to the law of gravity, 49,
52; its action on the sea,

121
Chaldeans, observations by

the, 37, 40

167;

Diaphanous bodies, 213
Distances in the universe

calculated, 47, 48, 66
Dynamics, principles of, 81;

the theory of, 411
Ear, the, 142, 148
Earth, its rotation uniform,

21,80 ; its circumference,
57 ; its fires, and heat
from the sun, 82, 85 ;
eccentricity of orbit, 85
whether cavernous, 90 ;

theories, 95, 370
Earthquakes, the noise of,

151
Echo, 150
Eclipses, comparison of, 37,

40

description of lunar,
44

of Jupiter's satellites
is chronometrical, 30
Ecliptic, the, 94, 103

variation of the, 20
Egyptians, astronomy of

the, 105
Elastic bodies, vibrations of,

153
Electricity, science and phe.

nomena of, 151, 285

Chimborazo, Mount, 56
China, observations made

in, 104
Chladni, experiment of, 147
Christian era, the, 100
Chronology of the visible

heavens, 389
Climate, 257, 267, 271
Coal, 83
Cold, 264, 266
Colours, prismatic, 172 et

seq.; of the stars, 393
Columbus and Lerius, 280,

314
Comets, theory of, and de-

scription of Encke's and
other remarkable comets,

67, 359 to 383
Compass, the mariner's, 313,

330
Compression, doctrine of,

90
Conductors, electrical, 294,

298
Conjunction of planets,

dates of, 46
Connexion of the physical

sciences, conclusion, 413
Constellations, motion and

revolution of, 391
Crystal, 212
Crystallization, 235, 243,

308
Curvature of the earth, 54
Day, the solar, 97

divisions of, 98, 107
Dew, phenomenon of, 240
Diameters of the sun and

planets, 67

seq. 303, 353
Electrics, Non, 289
Electro-magnetism, 324,330,

340, 343
Elevation of the earth at

the equator, 51, 59
* Ephemeris,' the, 47
Equator, the, 50, 94, 265,311
Equinox, vernal and au.

tumnal, 41

et

Eras and chronology, 100,

103
Ether, all-pervading, 359
Ethereal medium, the, 192,

217
Eudoxus, 105
Existence, grades of, 234
Faraday, Mr., 325, 336, 340,

356
Figure of the earth, 48, 54,

106
Fire, production of, 241
Flora, reign of, 273, 277
Fluids, properties of, 214,

219, 235, 249
Forests, influence of, 264
Fresnel, M., 216, 218
Frost, hoar, 240
Galvanism, 300 et seq. 345
Galvanometer, 351
Geology, 83
Glass, musical vibrations of,

157; prismatic phenome-
na, 172, 188; refraction
and polarization of light
by, 203, 216; imperme-
able to rays of solar heat,

229, 232
Gravitation, 410
Gravity, variation in, 50
Gymnotus electricus, 357
Heat, the earth's, 82; solar

radiation, 84, 228, 238;
of the atmosphere, 132;

theory, 244
Herbarium, Tartar, 275
Herschel, Sir William, 79,
228, 236, 384, 392, 397

Sir John, 147, 195,
386, 391, 398

Herschel, Miss Caroline,

398
Hipparchus, 93
Horizon, its density of at-

mosphere, 171
Horoscopes, accordance
with astronomy,

106
Humboldt, Von, 132, 134,

146, 258, 280, 348
Ice, formation of, 83; thaw,

247, 271
Icebergs, '23
Indians, their lunar tables,

104
Inequalities, secular and

periodic, 17
Insects, 283
Interferences, laws of, 152,

157, 184
Iron, 321
Isothermal lines, the, 267,

269
Italy, the north of, 56
Ivory, Mr., investigations

by, 49, 56
Jupiter, the revolution of,

17, 24; satellites of, 38,
79; magnitude of, 67 ;

density, 96
Kater, Captain, 106
Kepler, theory of, 7, 18, 64,

74, 362
La Grange on Periodical

Inequalities, 21
Language, its vocal articula.

tions imitated by instru-
ments, 162; primitive

tongues, 284
La Place, 22, 37, 73, 101,

103, 115, 135

gree, 57

new,

Laroche's experiments in Meridian, terrestrial, 54
optics, 229—233

Meridians, whether ellipti-
Latitude, degrees of, 54 cal, 56 ; length of a de-
Leyden jar, the, 297, 355

Metals, dilation of, 243, 300
Light, mode of mea

neasuring
its transit, 31; its ana-

Meteoric stones, 405, 406
logy with sound, 148 ; at. Milky way, the, 66, 395
mospheric action on, 163;
the sunbeam and prisma-

Mirage of deserts, 169
tic experiments, 172; the Momentum, primitive pla-
Newtonian theory, 181;

netary, 13
its ethereal medium, 192,

Moon, the, 34; distance of,
217; allied with rays of

62
caloric, 232; from calo.
ric, 241,
358

45

luminous spots of
its velocity calcu.
lated, 412

the, 405

and earth, reciprocal
Lightning, 297, 304

influence, 10, 38, 77, 94 ;
Magnet, the, 309–339

calculation of distances,
Magnetic pole, the, 310

47; dimensions, 66, 68;

theory of tides, 110
Magnetism, theory of, 309,
319-340

Mountains, deposits on, 86;

height of, 131; influence,
Malus, M., optical disco-

260

Muscular strength, 134
Man, frame of, 251; species

Music, elements of, 155, 157,

159, 160; musical articu-
Marine plants, 279

lation, 161
Mars, the planet, 64, 254

Nature, the laws of, 408,
Matter, properties of, 129; 413
temperature of, 239

Nautical Almanac, 47
-, its molecular action

Navigation, new astrono-
on light, 215

mical aid to, 30, 46
Measures, standard of
weights and, 106

Nebulæ ; clusters of stars,

nebulous, and of great
Mechanical agents and magnitude, 395, 397, 399,

402, 404
Melloni, M., experiments, Needle, the magnetic, 310
230 et seq.

Newton, 1, 21, 50, 172, et
Mercury, 327

the planet, 255, 392 Occultation of stars, 46

very, 222

of, 283

powers, 249

seq.

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