Or device for regulating the rate of progression made by Law; and a few pencil marks on a plate, and close to the one which passes to the cylinders, the engineer "links up" his reversing gear, 65. Governors, speed, 67; of motor cars, 109. Siphon, _351_. Slide-valve, 49, 50, 51; setting of, 53. Sliders, 297. Sound, nature of, 112; static, 114. Electric bell, 119, _120_; signalling.