this citation summarizes a one-page announcement of technology available for utilization. a disposable electrode for etching inco 625 (or equivalent) alloy works better than does the previous, more expensive version. the size and shape of the electrode make it easier than before to etch in narrow grooves and other confined spaces. the electrode is designed to prevent arcing, which damages the metal workpiece. the old version of the electrode includes a stainless-steel rod, the end of which is wrapped in cotton and fiberglass. the cotton and fiberglass are imbued with the etching solution. the positive side of a dc power supply is connected to the workpiece, and the negative side to the electrode. the electrical circuit is completed, and etching occurs at the contact between the workpiece and the electrode. if particular care is not taken, the cotton and fiberglass rapidly break down, causing the rod to break through and arc to the workpiece, causing damage. in the new version, the stainless-steel rod is replaced with a piece of wood--for example, a tongue depressor. the wood is wrapped with a piece of copper wire, which provides the necessary electrical conduction. the wire is covered with cotton, then fiberglass. (the fiberglass and cotton must make contact with the wire to complete the circuit.) plater's tape is wrapped around most of the electrode assembly, excepting only the portion that is to do the etching. as in the old version, the electrode is imbued with etching solution and connected to the dc power supply. the new version etches without drawing arcs between the