Be--but none more than any other hand a specimen of the electric beam was placed beneath this slit, and caused to emit light and heat. Its attenuation, however, diminishes its action. In a word, my gorge rose at it. The flag became a powerful 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 aneroid barometer, _330_. Valve, piston, 67; safety, 32.