罗马人发明的一种漏壶则是让水从蓄水器滴入一圆筒，筒内有一浮子，在筒壁的刻度尺上指示读数。
The Romans invented a clepsydra consisting of a cylinder into which water dripped from a reservoir; a float provided readings against a scale on the cylinder wall.
北美印第安人及某些非洲人使用的漏壶是一只小船或能浮起的容器，从小孔中往船里进水，直至船沉没为止。
One form, used by North American Indians and some African peoples, consisted of a small Boat or floating vessel that shipped water through a hole until it sank.
北美印第安人及某些非洲人使用的漏壶是一只小船或能浮起的容器，从小孔中往船里进水，直至船沉没为止。
One form, used by North American Indians and some African peoples, consisted of a small Boat or floating vessel that shipped water through a hole until it sank.
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