When water is poured into a vessel, what becomes of it?
It spreads out so that its surface is level.
When different vessels are connected together, what does the water do?
It falls to the same level in all of them.
How high will the tea stand in the spout of a tea-pot?
Just as high as the tea is in the tea-pot.
Fig. 20.
Will the tea in the spout balance that in the tea-pot?
The tea in the spout will balance that in the tea-pot, as is shown in [Fig. 20].