1. Errata

   Erratum Pages: i - i

2. Editor's report on the International Journal of Biometeorology

   • W. H. Weihe

   EditorialNotes Pages: 115 - 117

3. Seasonal changes in the daily rhythms of animals

   • J. L. Cloudsley-Thompson

   OriginalPaper Pages: 119 - 125

4. Long-term investigations of atmospheric ionization in Tartu, Estonian SSR

   • P. Prüller
   • J. Reinet

   OriginalPaper Pages: 127 - 133

5. The biophysics of plant growth in a reversed electrostatic field: A comparison with conventional electrostatic and electrokinetic field growth responses

   • L. E. Murr

   OriginalPaper Pages: 135 - 146

6. Physiological stimulation of plants using delayed and regulated electric field environments

   • L. E. Murr

   OriginalPaper Pages: 147 - 153

7. Environmental temperature and 17-ketosteroidogenesis in sheep

   • Al. Lungu
   • A. Tache
   • V. Teodoru

   OriginalPaper Pages: 155 - 161

8. The influence of humidity on growth rate and feed utilization of swine

   • S. R. Morrison
   • H. Heitman Jr.
   • P. Finn-Kelcey

   OriginalPaper Pages: 163 - 168

9. Effects of heat on drug action in man

   • K. I. Furman

   OriginalPaper Pages: 169 - 174

10. Exposure to heat: Comparison of responses of dog and man

    • P. F. Iampietro
    • V. Fiorica
    • R. F. Goldman

    OriginalPaper Pages: 175 - 185

11. A method of assessing the heat load on workers moving about in a complex thermal environment

    • C. M. Humphreys
    • F. Dukes-Dobos

    OriginalPaper Pages: 187 - 196

12. Sixth Scientific Session of the Rumanian Institute of Meteorology

    • F. Cocu

    Reports and News Pages: 197 - 200

13. Book reviews

    • H. E. Landsberg
    • H. Brezowsky
    • W. H. Weihe

    BookReview Pages: 201 - 203