Note 21 — ROBERT-HOUDIN—CONJURER, AUTHOR AND AMBASSADOR.

“The cut represents the magic clock invented by Robert-Houdin about sixty years ago. This very remarkable time-piece consists of a dial composed of two juxtaposed disks of glass, one of which is stationary and carries the hours, while the other is movable and serves for the motion of the hands. This latter disk is provided with a wheel or rather a toothed ring concealed within the metallic ring forming a dial. The glass column which constitutes the body of the piece is formed of two tubes which operate according to the principle of the dial, that is to say, one is stationary and the other movable. To each of the extremities of the latter is fixed a wheel. These wheels gear with transmission pinions which communicate, one of them at the top with the movable plate of glass of the dial, and the other at the bottom with the movement placed in the wooden base which supports the glass shade covering the clock. All these concealed transmissions are arranged in a most skillful manner, and complete the illusion. The movable glass of the dial, carried along by the column, actuates a small dial-train mounted in the thickness of the stationary glass, and within an extremely narrow space in the center of the dial. It is covered by the small hand and is consequently invisible. The hands are very easily actuated by it on account of their extreme lightness and perfect equilibrium.”—Scientific American, N. Y.