It's always fascinating to watch tenured faculty members leaving their ivory cocoons where they lecture to impressionable teenagers and 20-somethings to come face-to-face with skeptical middle-aged men. Such an encounter occurred last week in one of the few hearings the U. S. Senate Foreign Relations Committee deigned to hold on the Law of the Sea Treaty, the U.N.-generated pact that many fear would cede control of the oceans to that international body.