An amazing video covering such unique aspects of ancient India.
http://www.youtube.com/watch?v=qcNUyuBelME
One of the Last Water Clock in The Jain Temple named Chandravati. This was last seen in 1994. Below mentioned video would start from Water Clock reference.
http://www.youtube.com/watch?feature=player_embedded&v=qcNUyuBelME&t=266