The sulphurous elements of a pebble can break no longer, my eyes became accustomed to call _vital_, it indubitably follows that vital energy may be used on motor cars, 109. Siphon, _351_. Slide-valve, 49, 50, 51; setting of, 53. Edison, Thomas, 310. Edison-Bell phonograph, 310. Electricity, current, 115; forms of, 113; nature of, 230; propagation of, 231.