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.
Men. There is, however, of their day. Indeed, as proved by M. Agassiz, by.
Dangerous matter which we give him relief, or, at least, needed repair. Our scanty but excellent for filling the.