Show PLATINUM NOW NO HAS SUBSTITUTE White Gold Used Extensively Extensive Extensive- ly for Jewelry w WASHINGTON March 31 Govern Govern Government ment scientists after atter extensive Investigations investigations have found what they declare to be a satisfactory substitute for platinum platinum plat plat- for various purposes according to an announcement by the United I States bureau of ot mines In chemical requirements and for use In high duty electrical contacts however the an announcement announcement announcement an- an said no substitute for platinum has ever been discovered One of ot the most promising substitutes substitutes substitutes was said by the E experts to be what ha hag bas come to be bo known as white gold which is an alloy of ot gold and one of ot the pl platinum Unum metals This closely resembles platinum it was said and is not attacked by nitric acid White gold Is used extensively In certain classes of ot Jewelry but does not replace platinum In the manufacture of high class Jewelry It was pointed out Experts In the bureau of mines said that owing to its resistance to the action of acids and most chemical agents even eyen at high temperature and to its high melting point platinum has been used extensively for the manufacture manufacture manufacture manu manu- facture of crucibles basins foils tolls and wire and for chemical laboratory work Most M st of ot the metal produced Inthe in inthe inthe the United States is said to be recovered recovered recovered ered as a secondary mineral from placer er operations and from the refining of ot gold bullion bumon and blister bUster content From time to time the bureau bureau bureau bu bu- reau said the beach sands of ot Oregon and Northern California h d' d been exploited ex exploited exploited ex- ex by promoters promoters- on the basis of ot othe the tho gold and platinum content I |