sponsored by ASTM Committee C-1 on Cement, American Society for Testing and Materials ; P.K. Mehta, editor. sponsored by ASTM Committee D-19 on Water, American Society for Testing and Materials ; R.L. Weitzel, editor. sponsored by ASTM Committee E-35 on Pesticides, American Society for Testing and Materials ; J. R. Beck, editor. sponsored by ASTM Committee D-19 on Water American Society for Testing and Materials. sponsored by ASTM Committee E-28 on Mechanical Testing, American Siciety for Testing and Materials ; J. R. Newby and B. A. Niemeier, editors. sponsored by ASTM Committee E03 on Chemical Analylsis of Metals American Society for Testing and Materials ; J. E. Foster. sponsored by ASTM Committee E03 on Chemical Analysis of Metals, American Society for Testing and Materials ; editor, J. E. Foster. sponsored by ASTM Committee E-28 on Mechanical Testing, American Society for Testing and Materials, Kansas City, Mo., 24, 25 May 1978. sponsored by ASTM Committee E-35 on Pesticides, American Society for Testing and Materials, New Orleans, La., 17 Oct. 1978 ; E. E. Kenaga, editor. sponsored by ASTM Committee D-9 on Electrical Insulating Materials, American Society for Testing and Materials ; R. Bartnikas, E. J. McMahon, editors.