This water cart has two points of interest on the back. On the left is an information panel and on the right is an opening that lets you look inside.
The panel says:
This water cart was used at the Tasmania Mine to spray the mine year to rest the dust. The driver could operate the release valves with a foot lever.
The draught horse pulling the cart must have been a powerful animal as the tank held amost a tonne (1000kg) of water!