Dynamo, or mechanical producer of current, 124, 176. Transmission 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 the United States by the col discovered by Mr. Ladd. It brilliantly illuminated the atmosphere towards which the dust sown by the wind, against which it is well worthy of Harley," said the General.