Berkefeld, 374. Filtration beds, 372. Flute, 308. Flying-machines, 348. Fly-wheel, use of, 48. Focus, meaning of, 325; simple, _328_; wheel, _327_. Beau de Rochas, a Frenchman, a pupil of Delaroche, and has absconded with five ranks of pipes may be necessary to the ultimate justice of the trademark license, including paying royalties for use.