It is a Copper Dish holding about a Pint, with a very small hole in the bottom.

This Dish they set a swimming in an Earthen Pot of water, the water leaking in at the bottom till the Dish be full, it sinks.

And then they take it out, and set it empty on the water again, and that makes one Pay.

Few or none use this but the King, who keeps a man on purpose to watch it continually.

The People will use it upon some occasions, as if they are to sow their Corn at any particular hour, as being the good lucky Season, then they make use of the Copper Pan, to know the time exactly.
[Their Magick.] They do practise Magick.