INDEX. 



Humboldt, Baron A. von, 734, 892, &c. 



Button, 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 



Bays, 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. 



Kettand, Professor, 421, 690. 

 Eater, 240. 



Lagrange, 20, note ; 41, &c., 90. 



Lalande, 162. 



Lambert, 661. 



Lambton, 250. 



Laplace, 51, 60, &c., 199, 235, note, 433. 



Lassell, Mr, 284. 



Latent Heat, 584, &c., 599, 724. 



Lavoisier, 605. 



Legendre, 85, 95, &c. 



Leslie, Sir John, 641, &c. 



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, &c., 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, 



903. 



Matteucci, 739. 

 " Mecanique Celeste," 89. 

 Mechain, 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, its Connection with 



Mathematics, 24 ; with the Mechanical 

 Arts, 32, &c. 



Nautical Almanac, 153. 



Navier, M., 354. 



Nebulze, 190, 302. 



Nebular Theory, 198, &c. 



Neptune, Discovery of, 127, &c. ; Ele- 

 ments of, 143. 



Nicholson and Carlisle, 754. 



Niepce, Nicephore, 569. 



Nobili, 708, 738, 802. 



Oersted, 786, &c., 803, &c. 

 Olbers, 161. 

 Ohm, 840. 

 Optics, 444, &c. 



Parallax of Stars, 188, 306, &c. 

 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, &C. 

 Planets, New small, 282, &c. 

 Play/air, 16, note. 

 Plenitude of Stars, 203. 

 Pliicker, Professor, 831. 

 Poinsot, M., 113. 

 Poisson, 55, 112, &c., 689. 

 Polarization of Light, 474, &c., 525, &c. ; 



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, &c. 

 Pulkowa, Observatory of, 293. 



Quartz, Optical Properties of, 511. 

 Quaternions, 552, note. 



Radiant Heat, 641, &c., 692, &c. 



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. 



RoUson, 329, &c., 749. 



Ross, Sir J. C., 884, 910. 



Rosse, Earl of, 299. 



Rotation of the Earth, 258. 



Royal Institution, 637. 



Rumford, 632, &c.; Rumford Prize, 637. 



Russell, Mr J. S., 421. 



Russo-ScandinavianArcof Meridian,254. 



Sabine, Major-General, 238, 246, 909. 



Safety Lamp, 393, 770. 



Satellites, New, 284. 



Savart, 441. 



Schehallien Experiment, 155. 



Scheutz, M., 380. 



Schuieigger, 802. 



Seebeck, 512, 544, 801. 



Ships, Magnetism of, 879. 



" Sirene," 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, 



306; Brightness of, 297; Variable, 



298. 



Steam, Elastic Force of, 699. 

 Steam Carriage, 384. 

 Steam Engine, 317, &c. 

 Steam Navigation, 325. 

 Stephenson, George, 392, &c. 

 Stephenson, Mr R., 355, &c. 

 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.,*^99, &c. 



Telford, 351. 



Thermo-electricity, 801. 



Thermo-nmltiplier, 709. 



Thomson, Professor W., 878. 



Tides, 69, &c. 



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, &c. 

 Uranus, Discovery of, 183; Perturbations 

 of, 132, &c. 



Variable Stars, 298. 



Variation or Declination of the Needle, 



881. 



Variation of Parameters, 44. 

 Venturi, 413. 

 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, &c. 



Water, Composition of, 597; Maximum 



Density of, 636. 

 Water Wheels, 426. 

 Watt, James, 312, &c., 597. 

 Weber, The MM., 420, 856, 899. 

 Wells, 706. 



Wheatstone, Mr, 581, 853, &c. 

 Whewell, Dr, 19, 79. 

 Wilson, P., 185. 

 Wollaston, 476, 538, 564, 780, &c. 



Young, Thomas, 80, 342, &c., 445, &c., 

 488, 506, 780. 



