Characteristic details about himself and England by bestowing an annual pension of 200 pounds on Dr. Joule.] ******************** XX. THE COPLEY MEDALIST OF 1870. THIRTY 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.