1. Acute toxicity of chrome electroplating wastes to microorganisms: adsorption of chromate and chromium(VI) on a mixture of clay and sand

   • Mohammad Ajmal
   • Azhar Amin Nomani
   • Asim Ahmad

   OriginalPaper Pages: 119 - 127

2. Toxicity and binding of copper, zinc, and cadmium by the blue-green alga, Chroococcus paris

   • Albin Les
   • Robert W. Walker

   OriginalPaper Pages: 129 - 139

3. Study of landscape-agrogeochemical balance of nutrients in agricultural regions: Part III. Nitrogen

   • V. N. Kudeyarov
   • V. N. Bashkin

   OriginalPaper Pages: 141 - 153

4. Computed and measured leaching of the insecticide methomyl from greenhouse soils into water courses

   • M. Leistra
   • A. Dekker
   • A. M. M. van der Burg

   OriginalPaper Pages: 155 - 167

5. Bioaccumulation et repartition tissulaire du mercure — HgCl₂ et CH₃HGCl — chez Salmo gairdneri apres contamination par voie directe

   • F. Ribeyre
   • A. Boudou

   OriginalPaper Pages: 169 - 186

6. Frequency distributions for durations and volumes of rainfalls in the Eastern United States in relation to acidic precipitation

   • Lance S. Evans
   • Gilbert S. Raynor
   • Douglas M. A. Jones

   OriginalPaper Pages: 187 - 195

7. Thorium 230 determination in polluted lake water — A study of interferences

   • I. G. De Jong
   • D. R. Wiles

   OriginalPaper Pages: 197 - 208

8. Interaction of clays with dilute fluoride solutions

   • J. Slavek
   • H. Farrah
   • W. F. Pickering

   OriginalPaper Pages: 209 - 220

9. Book reviews

   • K. C. Pillai
   • Michel Bernarie
   • Clarence G. Golueke

   BookReview Pages: 221 - 231

10. Announcement

    Announcement Pages: 233 - 233