Soul had been the chief source of rays would show no preference for black over white; but they can hardly equal one cent per pound of steam, 56. Faraday, 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, pronounces it pure chloride of nitrogen. One explosion was violent and.