Abstract: A device for automatically selectively watering plants in a predetermined order for predetermined times comprises a casing which is connectable to a source of water under pressure and which houses a turbine wheel arranged to be driven by the water and to drive a set of gears which form a speed reducer the output shaft of which extends out of the casing and carries a plurality of cams spaced apart along the shaft and each arranged to operate a valve of the pilot-operated type, the valves being identical, juxtaposed in a straight line, and connectable to pipes provided with watering nozzles.

Abstract: The elecric capacitance of a condenser changes when electromagnetic radiation reacts with the dielectric material of the condenser causing an increase in dielectric constant of unique dielectric material. This increase is due to electron polarization increase caused by the action of radiation raising electrons to excited states where electronic polarizability is greater. A subsequent removal of radiation causes a return of the electrons in the condenser's dielectric to ground state and a consequent decrease in dielectric constant. Repeating the cycles of radiation and removal of radiation produces continually changing capacitance in a condenser and when this condenser is placed in series electric circuitry with another condenser, on which a high voltage is maintained, and a transformer then an A.C. current is caused to flow through the transformer enabling useful electric work to be done by appropriate electric connections to the secondary windings of the transformer.