1. a School of Chemical Engineering, Cornell University , Ithaca , N.Y. , 14853 , U.S.A.
2. c Computer Centre , Australian National University , P.O. Box 4, Canberra , A.C.T. , 2600 , Australia
3. b Science Research Laboratory , U.S. Military Academy , West Point , N.Y. , 10996 , U.S.A.
4. d School of Chemical Engineering, Cornell University , Ithaca , New York , 14853
5. e Physical Chemistry Laboratory , South Parks Road, Oxford , OX1 3QZ , England