Note:  Do not rely on this information. It is very old.

Hydro Electric Machine

Hydro-Electric Machine is a machine invented by Sir William Armstrong for the separation of opposite electricities on a large scale. Steam is generated in a boiler, and is made to blow through specially-shaped orifices of wood against a series of points arranged in front. In this simple way, analogous to the rubbing of dissimilar substances (such as glass and silk), the separation is effected, and very great differences of potential produced on the collectors. [Electricity.]