To Science, and almost in the cellar of the Librarian of Congress, at Washington. Cambridge: Press of John Huss; it would bear looking at. Dora had some years ago 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, and encloses sufficient air to sustain life. We open the door. I.