diate 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 is a Bunsen plate. As it is sometimes diflBcult to hold the anode in or Grenet… … devised, and some commercial applications have been made. It has been used to some extent in the orna- mentation of small objects, such as buttons, articles of Fig. 3.-METALL0 CHROMES AND ANODES. Fig. 1. PEODUCTION OF NOBILI'S RINGS. jewelry, etc., imparting to them an iridescence which cannot be…
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