30.105 J.W. Bloemer – J.A. Eibling – J.R. Irwin, Design of a basin-type solar still, (Battelle Memorial Institute, Columbus, Ohio, 19 may 1964). Step 16: Just prior to installation if distillate troughs and glass cover, basin liner given coat og hot-mopped asphalt as an added protection against leakage and to give black surface. Blocks also coated with asphalt as added protection.