Water Clock Korea 'Jagyeongnu'

The water clock worked by having water poured into the largest bronze vessel which flowed into the smaller vessels which then flowed into the long water tanks. When the water level rose to the appropriate level, a floating rod touched a lever device which caused a ball to roll and hit another ball at the other end. The rolling ball would trigger the gong, bell, drum, and even a wooden puppet which marked the hour with a placard.