Foot, 29. Foot pound, 74. Forced vibrations, 207. graphical representation of, 52. Freezing mixture, 269. Freezing point, 240, 268. Friction, 111. coefficient of, 111. electricity produced by, 318, 323, heat produced by, 247. Fuse wires for electric circuits, 363. heat of, 283. g, determination of, 94. Galton's whistle, 235. Fall of potential along a conductor, Galvanic cell, 347. Gauss, 308. Geissler tubes, 403. General properties, 14. Gram, 31. Graph, 45. Gravitation, 80. Gravity, 80. acceleration of, 40. center of, 82. specific, 146-156. Gravity cell, 350. Gravity unit, of force, 48. of work, 74. Grids, 378. Gyroscope, 65. Hardness, 24. Harmonic motion, 191. Hartl optical disk, 444. absorption of, 257. and work, 287–299. effects of, 238, 259, 267, 269. expansion caused by, 238, 259–266. luminous, 258. measurement of, 281. mechanical equivalent of, 287. sources of, 246, 339, 362. transmission of, 248. wave length, 485. Heating, electric, 363. hot water, 251. Heat lightning, 343. Heat loss in electric current, 363. Heat of fusion, 283. Heat of vaporization, 284. Heat rays, 485. Helmholtz resonators, 232. Hertz waves, 506. Hoffman's apparatus, 374. Holtz machine, 335. Homogeneous atmosphere, 177. Homogeneous substance, 255. Hot water heating system, 251. Hydraulic press, 130. Hydraulic ram, 139. Ice, 266-269. manufactured, 277. Images, formed by lenses, 470. real, 453, 454. virtual, 445, 453, 454. Impact, heat produced by, 247. Incandescent lighting, 423. Inclosed arc lamp, 421. Index of refraction, 459. of currents, 328, 393-415. Induction coil, 400. Induction machines, 335. Initial velocity, Insulators, 322. 44. Interference, in light, 486. in sound, 203. in wave motion, 203. Internal resistance, 357, 390. International prototype standards, 30. Intervals in music, 215. Ionization, 517. Ions, 374. Isochronous, 94. Joule's equivalent, 288. Joly photometer, 441. Kelvin, Lord, 10, 402. Keynote, 216. Kilogram, 31. Kilogrammeter, 74. Kilowatt, 77, Kilowatt-hour, 391. Kinetic energy, 71. Kinetic theory, 11, 157, 237. Lactometer, 154. Lantern, optical, 495. Law, physical, 13. Lenses, 465-472, 475. Lenz's law, 412. bent, 101. compound, 102. law of the, 100. Leyden jar, 333, 341, 346. Lifting jack, 110. Lifting pump, 182. defined, 435. diffused, 443. dispersion of, 473. intensity of, 439. reflection of, 443. refraction of, 457. velocity of, 439. waves, wave length, 474, 484. Lines of magnetic force, 304. action of, 307, 394. heat conductivity of, 249. molecular forces in, 119-129. pressure of, 129–141. sound transmitted by, 195, 199. spherical form of, 119. surface tension, 120. Liter, 32. Local action, 348. Longitudinal vibrations, 192. Loops, in a sounding body, 222. Luminous bodies, 435. Luminous heat, 258. Lycopodium powder, 120. Machines, 96-118. general law of, 97. simple, 98. Magdeburg hemispheres, 168. Magnetic declination, 310. Magnetic drag, 414. Magnetic effects of electric currents, 364-373. Magnetic field, 308. of dynamo, 407. Magnetic induction, 312. Magnetic lines of force, 304, 364, 394. Magnetic meridians, 302. Magnetic needle, 302. Magnetic permeability, 306. Magnetic substances, 301. Magnetism, 300-317. explanation of, 314. of the earth, 308. Magneto, 404. Magnets, 300. distribution of magnetism in, 304. effect of breaking, 315. effect of heating, 315. lifting, 368. mutual action of, 303. Manometer, 179, 241. Matter, defined, 10. kinetic theory of, 11. |