1.  Readers will recognize the Ktesibios floating valve as the predecessor to the floating ball in the upper chamber of the porcelain throne.

2.  Fans of the young wizard can control an eerily floating ball, play with a newborn dragon and eat pond slime.

3.  For decades visitors have insisted that a floating ball of light haunts the road, a mystery featured in National Geographic magazine and on Japanese television.

4.  For decades, visitors have reported seeing a floating ball of light that varies in size from that of a softball to that of a basketball.

5.  His first woodcut depicted a swimming dog chasing a floating ball.

6.  The moorings are configured so that a chain and rope are permanently attached to the ocean floor, with a floating ball at the surface.