1. Calculated sulfur dioxide equilibria at low concentrations between air and water

   • Martin B. Hocking
   • Graham W. Lee

   OriginalPaper Pages: 255 - 262

2. Cadmium and nickel effects on growth and ozone sensitivity of pea

   • D. P. Ormrod

   OriginalPaper Pages: 263 - 270

3. Monitoring terrestrial ecosystems by analysis of nutrient export

   • R. V. O'Neill
   • B. S. Ausmus
   • A. P. Watson

   OriginalPaper Pages: 271 - 277

4. Loss of Ca and NO₃-N from terrestrial microcosms as an indicator of soil pollution

   • D. R. Jackson
   • C. D. Washburne
   • B. S. Ausmus

   OriginalPaper Pages: 279 - 284

5. Selectivity in mercury-copper and mercury-iron accumulation in plants

   • B. Z. Siegel
   • S. M. Siegel
   • Thomas Speitel

   OriginalPaper Pages: 285 - 291

6. The cytotoxic response of ‘nicotiana’ protoplasts to metal ions: A survey of the chemical elements

   • S. M. Siegel

   OriginalPaper Pages: 293 - 304

7. Sublethal effects of oil on mollusc species from the Baltic Sea

   • Olle Lindén

   OriginalPaper Pages: 305 - 313

8. Control tests and kinetics of activated sludge process

   • Lawrence K. Wang
   • Calvin P. C. Poon
   • Mu Hao Wang

   OriginalPaper Pages: 315 - 351

9. The spreading of crude oil spills across a lake

   • Colin R. Phillips
   • Velitchka M. Groseva

   OriginalPaper Pages: 353 - 360

10. Book reviews

    • Alistair J. Gilmour
    • Henry M. Papee
    • Samuel N. Linzon

    BookReview Pages: 361 - 366

11. Announcements

    Announcement Pages: 367 - 370