Legge's Hydro-Pneumatic Power Device. 1850
This is an English production, and the inventor claims that it is the result of fourteen years' study. We take the description from Dircks. It is as follows:
It is a dome-shaped vessel; its upper part A filled with air, and the lower half with water, as at B. This vessel contains two apparatus for returning the water which is worked through C D, apparently like pump barrels. The air is to be at from 250 to 500 pounds pressure on the square inch. When once started it will (it is stated) go on as long as it is oiled. The inventor estimates a one thirty-second share at one thousand pounds value.
