You could power generators that could light up a stadium.
The first class may again be subdivided into generators in which the water rises in contact with the carbide, in which it drips upon the carbide, and in which a vessel full of carbide is lowered into water and again withdrawn as generation becomes excessive.
One of the generators is out.
When turbines, as often happens in land practice, are directly coupled to electrical generators, their horse-power can be deduced from the electrical output.
Edison, with copious ingenuity, devised electric meters, electric mains, lamp fittings and generators complete for the purpose.