Abstract: A fluorine gas generator is provided with which the gases used and/or generated, in case of leakage thereof, can be prevented from mixing together as far as possible and, even in case of gas leakage into the outside of the generator system, the leakage gas can be treated safely and in which the maintenance, exchange and other operations are easy to carry out. The generator comprises a box-shaped body containing an electrolyzer for fluorine gas generation, and the box-shaped body is divided into two or more compartments, including a compartment containing the electrolyzer.

Abstract: The object of the present invention is to provide a spark plug having a discharge portion formed of a noble-metal chip increased in the Ir content while reducing the content of expensive Rh, which can be restrained from generation of unusual wear in the form of eroding the circumferential side surface of the noble-metal chip and exhibits excellent wear resistance.

Abstract: A fluorine gas generator for generating highly pure fluorine gas in a stable and safe manner by electrolyzing an electrolytic bath 2 comprising hydrogen fluoride in the form of a molten mixed gas is provided which comprises an electrolytic cell 1 divided, by a partition wall 16, into an anode chamber 3 in which an anode is disposed and a cathode chamber 4 in which a cathode is disposed, pressure maintenance means for maintaining the anode chamber 3 and cathode chamber 4 at atmospheric pressure, and liquid level sensing means 5, 6 capable of sensing the levels of the electrolytic bath 2 in the anode chamber 3 and in the cathode chamber 4, respectively, at three or more level stages.

Abstract: A method of efficiently supplying terrestrial plants with raising substances such as a solution comprises the steps of: producing a solution by an electrolysis of a water using a carbonaceous electrode; reducing the produced solution to minute particles or fine spray; and supplying the solution to the terrestrial plants including leaves entirely. An apparatus includes a container for storing water having at least a water inlet and a water outlet; a pair of electrodes comprising an anode and a cathode provided in the container, at least the anode being made of composition of carbonaceous materials and cured resins and molded into a plate-like form; a power supply to supply an electric current between the pair of electrodes to produce a solution by an electrolysis of the water; and a pump connected with the water outlet in the container for supplying the solution to the terrestrial plants.