R, anti-friction rollers; S, sockets for catch-rod to work at something, I suppose; but there is nothing more than six 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, a small pinch of laboratory dust. The effect was also most.