Science has not yet discovered how to grow hair on a billiard ball, but chemists in the General Electric Research Laboratory here can grow a handsome head of "hair" of a beard on "Aluminum Al," who is nothing more than a sheet of pure aluminum cut out in the shape of a mans head. As shown above, "Al" in a few minutes time can go from complete baldness through the tomahawk-type haircut to the tonsorially-respendent "Mr. Esquire hairdo. Amusing though he is, "Al's" purpose is a serious one of helping provide a better understanding of the most effective ways of using aluminum, which is replacing copper in many critical applications. According to GE scientist, aluminum could be not be used were it not obliging enough to furnish its own protective coating, a thin film of aluminum oxide, when cut. The film keeps air away and prevents further oxidation. "Al" demonstrates a condition under which this does not occur. When his surface is scratch under mercury, the film does not form. Instead the oxide sprouts out along the scratches is an uncontrolled, hair-like growth. Prof. J. H. Hildenbrand, University of California, is credited with the idea of first trying the oxidation principle on a cut-out head.
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