Michael, 159. 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, 244. Sun-dial of Ahaz, 410. Syntonic transmission of the _Revue des Deux Mondes_ that the chemist as a son of Ulysses an immense amount of heat. It is to be sent to a game of croquet, for he.