The base of the clock contains a revolving horizon, which shows the motion of the constellations. A six-inch globe, representing the earth, turns on its axis once in twenty-four hours; and about this globe a moon completes the circuit once in twenty-nine and a half days. All the machinery for producing these movements is in plain sight. The central part of the case above the base contains several dials showing the tides, the season of the year, the phases of the moon, the day of the week, and the day of the month. The largest of these dials has the hours and minutes. Just over this dial there is an oval niche where Youth, Manhood, and Old Age appear in turn as the hour goes by. An alcove at the right contains Father Time with his scythe, bell, and hour-glass. An alcove at the left holds a figure of Death, which is ready to strike the hour with a thigh-bone upon a skull. Above these images are the doors where Christ, the Apostles, and Satan appear and disappear. The figure of Justice is close at hand. Still above the Apostles is an upper balcony where the three Marys appeal". To crown all is a battlement, whereon a Roman sentinel paces back and forth. At the right of the main instrument above described a smaller tower contains an organ, which gives forth music during the march of the Apostles. Above the organ Orpheus and Linus appear with pipe and harp, but only while the organ sends out its strains. At the left of the main instrument a third tower represents the battle of Monmouth, and Molly Pitcher with her well-known water-keg.
The wonderful things that are done by the main part of the clock may be described thus: When the hour-hand approaches the first quarter. Father Time reverses his hour-glass and strikes one on the bell with his scythe. Youth then appears. Three minutes before the half-hour, a bell starts a tune from the organ. At the half-hour, Time again reverses his glass, strikes two on the bell, and Manhood appears. One minute afterward a chime is heard, and the Saviour steps forth from a door. The Apostles pass by—Peter in the center and Judas at the rear. The three Marys also come forth at the upper balcony and stand facing the spectators. Each one of the Apostles bows when opposite the Saviour, and the bow is returned. But Peter turns away—which is a signal for the cock to crow, for Satan to appear at the upper window, and for Justice to raise her scales. Judas does not look at the Saviour; but Satan follows behind him in the procession, to be sure that he does not bow, and then turns backward and disappears, only to reappear at an upper window. In fact, Satan appears in six different places. At the third quarter, Time strikes three, and again turns the hour-glass. Manhood passes by, and Old Age comes upon the scene. Three minutes before the hour the organ sounds once more; when the hour arrives, Death strikes the number on the skull, and the Apostles once more begin to move before the Saviour.
What is known as the "Rittenhouse Clock" is, in many respects,
