The hydraulic clock of Ktesibios

The hydraulic clock of Ktesibios is held by Kotsanas Museum of Ancient Greek Technology. Museum description: It was a marvel of automation, since the clock was able to operate continuously, without human intervention, indicating the 365 hour-days of the year (of altering day time hour duration). The water from a spring supplied, through a spillway, the upper bronze container. This, in turn, supplied the smaller intermediate container which was a constant level controller through a system it contained (a conical valve on the float to interrupt the flow). Then a dripper supplied the tall bronze container, drop by drop, with a constant water supply. With the rising of water there in the float rose and, through a rod, a statuette with a pointer rose at the same pace. The pointer indicated the hour of 24h on a rotating drum containing a trace of hours of day and night depending on the date. At the end of the 24 hours, the water exceeded the side-built siphon and drained rapidly. On the descent of th The museum record gives place associated: Alexandria; maker recorded: Kostas Kotsanas. These details come from the holding museum's own record; how far this object represents a wider collectible type has not yet been independently verified.