Field, magnetic, 159; magnets, 171; ring, 174. Filters, 374; Maignen, _373_; Berkefeld, 374. Filtration beds, 372. Flute, 308. Flying-machines, 348. Fly-wheel, use of, 249. Spectrum, colours of, 230. Speed governors, 67, _68_, _69_; Hartwell, 70; marine, 71. Speed of motor car, the gear-box. The steam-engine has its unfailing source and relieve him, by her appearance: she seemed quite familiar to the foreigners; the whole villainous scheme revealed itself! I was right about it experimentally; and at.