798 - 
Humboldt, Baron A. von, 734, 892, &e. 
Hutton, 591. 
Huygens, 453, 475. The Principle of, 
454, 
Hydrodynamics, 408, &c. 
Hygrometry, 614, 727. 
Indian Arc of Meridian, 250. 
Induction of Electric Currents, 816. 
Inequalities, Secular and Periodic, 47. 
Intensity, Magnetic, 885, 911. 
Integration, 31, 97. 
Interference of Light, 460; of Chemical 
Rays, 565. 
Isothermal Lines, 894, 
_ Irvine, 586, 589. 
Ivory, 103. 
Jacobi, C. G. I., 98. 
Jacobi, Mr M. H., 848, 868. 
Jamin, M., 557, 
Joule, Mr, 640. 
Jupiter and Saturn, Theory of, 65. 
Kelland, Professor, 421, 690. 
Kater,-240. 
Lagrange, 20, note; 41, &c., 90, 
Lalande, 162. 
Lambert, 661. 
Lambton, 250. 
Laplace, 51, 60, &e., 199, 235, note, 433. 
Lassell, Mr, 284, 
Latent Heat, 584, &c., 599, 724. 
Lawoisier, 605. 
Legendre, 85, 95, &c. 
Leslie, Sir John, 641, &e. 
Leverrier, M., 127, &c. 
Libration of the Moon, 57. 
Lines of the Spectrum, 538. 
Lighthouses, 496. 
Lloyd, Dr., 550, &c., 900, 910. 
Locomotive Engine, 383, &c. 
Lubbock, Sir J. W., 79, 117. 
Luminous Waves, Length of, 463. 
Lunar Observations, 152, 229. 
Lunar Theory, 61, &c., 118, &., 229. 
Maccullagh, 553, 
Magne-crystallic Force, 832, 
Magne-optic Force, 831. 
Magnetism, Terrestrial, 880, &c.; Theory 
of, 903. 
Magneto-electricity, 819. 
Magnifying Power, 179, 180. 
Malus, 474. 
Maskelyne, 150, 
Mathematics, Pure, 20, 24, 28, &c. 
Mathematical Theory of Heat, 661, &c. ; 
of Electricity, 869, &c.; of Magnetism, 
Matteucci, 739. 
*« Mécanique Celeste,”’ 89. 
Méchain, 166. 
Mechanical Arts, 11, 32, &c. 
Mechanical Notation, 378. 
Mechanics, 312, &c. 
Melloni, 707. 
Metallic Polarization, 534. 
Michell, 86, note, 156, 340, 
Milky Way, 201, &c. 
Miller, Patrick, 325. 
Modulus of Elasticity, 345. 
Natural Philosophy, ite Connection with 
INDEX. 
Mathematics, 24; with the Mechanical 
Arts, 32, &c. 
Nautical Almanac, 153. 
Nawier, M., 354. 
Nebula, 190, 302, 
Nebular Theory, 198, &c. 
Neptune, Discovery of, 127, &.; Ele- 
ments of, 143. 
Nicholson and Carlisle, 754. 
Niepee, Nicephore, 569. 
Nobili, 708, 738, 802, 
Oersted, 786, &c., 803, &c. 
Olbers, 161. 
Ohm, 840. 
Optics, 444, &e. 
Parallax of Stars, 188, 306, &e. 
Parameters, Variation of, 44. 
Pendulum Observations, 236; M. Fou- 
cault’s Pendulum, 258. 
Perturbations, Planetary, 46. 
Peters, M., 311. 
Photography, 567. 
Pictet, 648. 
Pile of Volta, 750, 752. 
Plana, M., 118, &e. 
Planets, New small, 282, &c, 
Playfair, 16, note. 
Plenitude of Stars, 203. 
Plicker, Professor, 831. 
Poinsot, M., 113. 
Poisson, 55, 112, &e., 689. 
Polarization of Light, 474, &c., 525, &e. ; 
affected by Magnetic Actions, 834; of 
Heat, 717; of Chemical Rays, 565; 
Circular, 491 ; by Metals, 534. 
Poles, Terrestrial Magnetic, 882, 884. 
Poncelet, M., 431. 
Pond, 227, 307. 
Potential, 877, 905. 
Powell, Professor, 560, 705. 
Prevost, 649. - 
Probabilities, 83. 
Proper Motions of Stars, 209, &e. 
Pulkowa, Observatory of, 293. 
Quartz, Optical Properties of, 511. 
Quaternions, 552, note, 
Radiant Heat, 641, &c., 692, &e. 
Railways, History of, 398. 
. Rainbow, Theory of the, 465. 
Reflection and Refraction of Light, 490. 
Refrangibility of Heat, 714. 
Refractions, Astronomical, 107. 
Regnault, M., 719, &c. 
Rheostat, 848. 
Ritter, 563. 
Rivers, Theory of, 410. 
Robison, 329, &e., 749. 
Ross, Sir J. C., 884, 910. 
Rosse, Karl of, 299. 
Rotation of the Earth, 258. 
Royal Institution, 637. 
Rumford, 632, &c.; Rumford Prize, 637. 
Russell, Mr J. 8., 421. 
Russo-Scandinavian Arc of Meridian,264. 
Sabine, Major-General, 238, 246, 909. 
Safety Lamp, 393, 770. 
Satellites, New, 284, 
Savart, 441. 
Schehallion Experiment, 155, 
Scheutz, M., 380. 
Schweigger, 802. 
Seebeck, 512, 544, 801. 
Ships, Magnetism of, 879. 
“ Siréne,” 441, 
Slide-Rest, and Planing Machine, 372. 
Solar Heat, 679. 
Somerville, Mrs, 566 and note. 
Sound, Theory of, 433, 
Specific Heat, 588, 599, 607, 727. 
Spectrum, Lines of the, 538; Heat of the, 
702, 715. 
Stability of the Solar System, 50. 
Stars, Double, 187, 291, 296; Proper 
Motions of, 209, 292; Parallax of, 188, 
ous ; Brightness of, 297; Variable, 
Steam, Elastic Force of, 699. 
Steam Carriage, 384, 
Steam Engine, 317, &c. 
Steam Navigation, 325. 
Stephenson, George, 392, Ke. 
Stephenson, Mr R., 355, &e. 
Stereoscope, 581. 
Stokes, Professor, 235, note; 247, 416, 
579, 691. 
Struve, M. W., 209, note; 252, 290, &c. 
Sun, The, 185, 
Suspension Bridges, 351, 
Talbot, Mr Fox, 571. 
Telegraph, Electric, 856, 
Telescopes, 178, &c., 299, &. 
Telford, 351. 
Thermo-electricity, 801. 
Thermo-multiplier, 709. 
Thomson, Professor W., 878, 
Tides, 69, &e. 
Torpedo, 872. 
Torsion Balance, 157, 340, 874. 
Transverse Vibrations, 488, 
Tredgold, 352. 
Trevithick, 385, &c. 
Turbine, 425. 
Tunnel, The Thames, 373, 
Undulatory Theory of Light, 452, &. 
Uranus, Discovery of, 183; Perturbations 
of, 132, &e. 
Variable Stars, 298. 
Variation or Declination of the Needle, 
881. 
Variation of Parameters, 44, 
Venturi, 413. a 
Venus and the Earth, long Inequality of, 
115. 
Vision, 471, 581. 
Volta, 740, &c. 
Volta-electric Induction, 817. 
Voltaic Pile, 749. 
Waves, Theory of, 419, &. 
Water, Composition of, 597; Maximum 
Density of, 636. 
Water Wheels, 426. 
Watt, James, 312, &e., 597. 
Weber, The MM., 420, 856, 899. 
Wells, 706, : 
Wheatstone, Mr, 581, 853, &c. 
Whewell, Dr, 19, 79. 
Wilson, P., 185. 
Wollaston, 476, 588, 564, 780, &e. 
Young, Thomas, 80, 342, &., 445, &., 
488, 506, 780. : 
