It is a large basin made so as to hold water.
How high is the water in the basin?
It is usually as high as the tops of the houses in the city.
How is the water raised into the basin?
It is raised into the basin by means of pumps.
How is the water conveyed from the basin to the houses in the city?
By means of pipes laid under the surface of the earth, and extending to all parts of the city.
How high will the water rise in these pipes?
Nearly as high as it is in the basin.
If an opening be made in a pipe, how high will the water be forced up?