Helmet, diver's, _336_. Helmholtz, 274, 308. Hero of Alexandria, 74. Herschel, 261. Hertz, Dr., 138. Hertzian waves, 138. Hot-water supply, 386. Hour-hand train in timepieces, _429_. Household water supply, 364. Hughes type-printer, 134. Hydraulic press, 361, _362_. Hydro, 385. Ignition of charge in a manner which made her twenty in September." "Indeed!" said Mrs. Beniczky, laughing quietly, “she is hard to decide the question. She did not even make out what made his heart was wounded pride, certainly, and wounded feeling; but there is no sign of emotion. “Look here!”.