LONDON, March 21 — There were bananas whose curvature could not be excessive, and rhubarb whose stalks must be straight, and they all belonged in the category of myths about the intrusiveness of European Union directives to its member states. But there is one order about to be imposed that sounds just as improbable — bizarre, even — and yet, it seems, is true: under a rule to curb hazardous substances in electrical products, Europe is about to restrict the centuries-old business of building pipe organs for churches, concert halls and other institutions. The reason? Organ pipes contain large amounts...