By: Tim Kravchunovsky The exhibition of recent stoneware vessels by Peter Voulkos at Frank Lloyd Gallery featured the sort of work on which the artist established reputation in the 1950s. The work was greeted with stunned amazement. However now it is too, but it's amazement of a different order -- the kind that comes from being in the presence of effortless artistic mastery. These astonishing vessels are truly amaising. Every ceramic artist knows that what goes into a kiln looks very different from what comes out, and although what comes out can be controlled to varying degrees, it's never certai