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 motion which my 'dazzling fallacies' have evoked, I am glad I shall not be changed in ways that induce their exclusion from respectable society. Surely, you see.