Large hourglass with round wooden bases joined by four bronze columns and resting on the ground by means of three elegant “spool” feet Glass ampoules connected by the original wooden disc containing sand. Measurements: height 71 cm - width 30.5 cm Also called a “sand clock”, the hourglass is an instrument for measuring time. Technically it consists of two containers of an approximately concave shape, locked in a cage made of various materials, connected to each other, and between which a very fine powder flows (sand, finely crushed egg shells, pulverized marble). will flow in a time p