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Show Platinum Substitutes The great Increase In the value of platinum during the last two decadea has led niuny Investigators to seek substitutes therefor. It appears that the search has been partly successful. I'latlnum-clad nickel steel wire In Incandescent In-candescent lamps; wires of nickel alloys al-loys are now making the cheaper grades of artificial teeth; asbestoa threads are now taking the place of platinum wires In gas mantles, and fused quartz ware has come Into general gen-eral use In chemical laboratories In the place of platinum utensils. Yet the Introduction of these substitutes has not affected the price of platinum. The demand for the metal seems steadily . to have Increased In spite of them. New York World. |