1. In memoriam Dr. Albert Paul Krueger

   • Alfred P. Wehner

   Announcement Pages: 197 - 199

2. List of published papers on air ions

   • A. P. Krueger

   OriginalPaper Pages: 200 - 204

3. The biological effects of air ions

   • A. P. Krueger

   OriginalPaper Pages: 205 - 206

4. Preface

   • R. Reiter

   EditorialNotes Pages: 209 - 210

5. Part A Remarks on the physics of atmospheric ions (natural and artificial)

   • Hans Dolezalek

   OriginalPaper Pages: 211 - 221

6. Part B Frequency distribution of positive and negative small ion concentrations, based on many years' recordings at two mountain stations located at 740 and 1780 m ASL

   • R. Reiter

   OriginalPaper Pages: 223 - 231

7. Part C Natural and artificially produced air ions — A biologically relevant climate factor?

   • P. Kröling

   OriginalPaper Pages: 233 - 242

8. Effects of low frequency electric fields on the sedimentation rate of human blood. Preliminary observations

   • J. Juutilainen
   • T. Lahtinen

   OriginalPaper Pages: 243 - 252

9. Long-term biological effects of air ions and D.C. electric fields on Namru mice: First year report

   • E. W. Kellogg III
   • M. G. Yost
   • A. P. Krueger

   OriginalPaper Pages: 253 - 268

10. Long-term biological effects of air ions and D.C. electric fields on Namru mice: Second year report

    • E. W. Kellogg III
    • M. G. Yost
    • S. H. Madin

    OriginalPaper Pages: 269 - 283

11. Air ion effect on respiration and photosynthesis of barley andAntirrhinum majus

    • T. M. Elkiey
    • S. Bhartendu
    • N. Barthakur

    OriginalPaper Pages: 285 - 292

12. Effect of magnetic micropulsations on the biological systems — A bioenvironmental study

    • S. Subrahmanyam
    • P. V. Sanker Narayan
    • T. M. Srinivasan

    OriginalPaper Pages: 293 - 305