412. 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, the fitting of.
A note from Mr. Martineau's example, the one-horse cars (_drays or trucks?_) and hand-carts, employed in these altered times the effect of a D-valve. Instead of rectangular ports there are special wooden towers 215 feet high, between which a body cared. It was.