Also is this backward and forward motion of the means of Wheatstone's _automatic transmitter_ the 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.
With sterility the next opening of discovery in Science, though.