1. How sensitive is the light microscope for observations on microorganisms in natural habitats?

   • Thomas D. Brock

   OriginalPaper Pages: 297 - 300

2. Are dissolved free amino acids free?

   • Niels O. G. Jørgensen
   • Morten Søndergaard

   OriginalPaper Pages: 301 - 316

3. Activities of benthic nitrifiers in streams and their role in oxygen consumption

   • A. Bryce Cooper

   OriginalPaper Pages: 317 - 334

4. Benthic bacterial biomass supported by streamwater dissolved organic matter

   • Thomas L. Bott
   • Louis A. Kaplan
   • Frank T. Kuserk

   OriginalPaper Pages: 335 - 344

5. Effects of streptomycin, cycloheximide, Fungizone, captan, carbofuran, cygon, and PCNB on soil microorganisms

   • E. R. Ingham
   • D. C. Coleman

   OriginalPaper Pages: 345 - 358

6. Absorption of pentachlorophenol (PCP) by bark chips and its role in microbial PCP degradation

   • Juha H. A. Apajalahti
   • Mirja S. Salkinoja-Salonen

   OriginalPaper Pages: 359 - 367

7. Distribution and sporulation phenology of myxomycetes in the Sonoran Desert of Arizona

   • Meredith Blackwell
   • R. L. Gilbertson

   OriginalPaper Pages: 369 - 377

8. The ecology of the yeast flora in necroticOpuntia cacti and of associatedDrosophila in Australia

   • J. S. F. Barker
   • P. D. East
   • M. Miranda

   OriginalPaper Pages: 379 - 399

9. Book review

   • Ilan Chet
   • R. Campbell

   ReviewPaper Pages: 401 - 404