1. Present research problems in environmental biophysics

   • H. Lieth
   • K. Wagener

   OriginalPaper Pages: 97 - 100

2. Total anthropogenic CO₂ production during the period 1800–1935 from carbon-13 measurements in tree rings

   • K. Wagener

   OriginalPaper Pages: 101 - 111

3. Ecosystem, open thermodynamic system. The oak forest of Virelles-Blaimont

   • A. B. J. Galoux

   OriginalPaper Pages: 113 - 130

4. Significance of leaf orientation for leaf temperature in an amazonian sclerophyll vegetation

   • E. Medina
   • M. Sobrado
   • R. Herrera

   OriginalPaper Pages: 131 - 140

5. The theory of tree bole and branch form

   • David King
   • Orie L. Loucks

   OriginalPaper Pages: 141 - 165

6. The effects of water-stress on leaf H₂ ¹⁸O enrichment

   • F. Farris
   • B. R. Strain

   OriginalPaper Pages: 167 - 202

7. The H₂ ¹⁸O enrichment in the leaf water of tropic trees: Comparison of species from the tropical rain forest and the semi-arid region in Brazil

   • G. Zundel
   • W. Miekeley
   • H. Förstel

   OriginalPaper Pages: 203 - 212

8. Announcement

   Announcement Pages: I - I