Powder Technology, 28 (1981) 91 -95 Elsevier Sequoia S.A_, Lausanne - Printed in the Netherlands Grinding and Granulation in a Vibratory Ball Mill IAN KRYCER 91 School of Pharrnaceutics, Victorian College ofPharmacy Ltd_ 3S] Royal Parade, Parhc:!le_ Vic., 3052 (Australia) and JOHN A_ HERSEY Institute of Drug Technology Ltd., 381 Royal Parade, Parhrille, Vic-, 3052 (Australia) …