Sisyphus circulates on the clock attached to the minute hand. Slowly, the minute hand decapitates her. They measure for the minute hand, and for the hour hand. The tower clock has only an hour hand and no minute hand. His Key can be split into two halves; an Hour Hand and a Minute Hand. It was the first public clock in London to have a minute hand. The length of the hour hand is , and of the minute hand . A long "minute hand" makes one revolution every hour. The minute hand is long, while the hour hand is long. The gear train scales this rotation so the minute hand rotates once per hour. By 1680, both a minute hand and then a second hand were added. Then, the minute hand advances one step and the second hand starts a new cycle.