rmediate and low pressure cylinders is process in brilliant colors. not variable, ordinary Trick-ported valves being used. for producing a figure of the same general form on the To produce the rings, all that is required isa Bunsen plate. Asitis sometimes difficult to hold the anode in or Grenet… … mentation of small objects, such as buttons, articles of Fig. 2.—METALLO-CHROMES AND ANODES. Fig. 1—PRODUCTION OF NOBILI’S RINGS. jewelry, ete., imparting to them an iridescence which cannot be imitated by any artificial coloring. All the bearings and wearing surfaces are of liberal plated brass…
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