Mechanism," p. 243 Chapter XVIII. HYDRAULIC MACHINERY. The siphon--The bucket pump--The force-pump--The most marvellous pump--The blood channels--The course of time through shoal water, the source of power, 174, _175_. Transmitter, Edison telephone, 150; granular carbon, 150, _151_. Triple-valve, 196. Trolley arm, 176. Turbines, steam, 74. _Turbinia_, the, 79. Tympanum, 137, 271, 272. Universal joint, 93. Vacuum brake, 189, _190_, _191_. Vacuum chamber of aneroid barometer, _330_. Valve.