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A portion of a metal surface was protected by means of a stencil during exposure in air to 100 kilovolt cathode rays. An attempt was then made to ``develop'' an image of the stencil on the metal surface by the action of some chemical or other reagent. Results confirm previous reports that water vapor is helpful if not essential to satisfactory development. On the metals, silver, copper, tin, zinc, lead, brass, and bismuth, the inorganic materials investigated for developing properties were superior to the organic materials tried. The image was not developed directly by electroplating by any method yet tried on any material except carbon. Attempts to produce an image in relief by first developing it in the ordinary way and then electroplating the specimen, failed except when anthraquinone was used as the developer. However, results by this method were uncertain. Cadmium vapor as a developer produces images of low relief.