IF IT GLITTERS IT MAY BE GOLD By: Marcus N. Allhands, PhD, PE What do gold and automatic self-cleaning screen filters have to do with one another? The tale below tells of this unusual yet necessary relationship. Well into prehistory man has marveled at the sight of gold. It had no sustaining significance since it could not be eaten or worn. But its luster, durability and shear beauty were mystifying. For nearly 4000 years gold has

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