Surface distributions of dislocations in metals: II

It is shown that the rotation axis of a boundary containing dislocations of three systems can lie anywhere on the surface of a cone; to each direction of the rotation axis there corresponds a single boundary plane. The theory cannot explain the experimental evidence on misorientations in zinc unless slip occurs in non-basal directions, or on planes not hitherto reported, at high temperatures. The experimental evidence for face-centred cubic metals is insufficiently precise to form a test of the theory.