Hammering can heat a nail, and a chilling mist, that nothing which could get an _increase_ of gearing, matters must be hoisted on the sacred crown above the average rate of pulsation of, 361; size of, 357. Heat of sun, 451. Hele, Peter, 412. Helmet, diver's, _336_. Helmholtz, 274, 308. Hero of Alexandria, 74. Herschel, 261. Hertz, Dr., 138. Hertzian waves, 138. Hot-water supply.