1. Scattering of molecular beams from surfaces

   • J. P. Toennies

   Invited Paper Pages: 91 - 114

2. Applications of tunable dye lasers to air pollution detection: Measurements of atmospheric NO₂ concentrations by differential absorption

   • K. W. Rothe
   • U. Brinkmann
   • H. Walther

   Contributed Papers Pages: 115 - 119

3. Partially coherent multiple-beam interference

   • Hitoshi Fujii
   • Toshimitsu Asakura

   Contributed Papers Pages: 121 - 129

4. Effect of diamagnetic substitutions in BaFe₁₂O₁₉ on the magnetic properties

   • A. Grill
   • F. Haberey

   Contributed Papers Pages: 131 - 134

5. Investigation of the characteristic energy losses of platinum (111)

   • W. Schröder
   • E. Peters
   • J. Hölzl

   Contributed Papers Pages: 135 - 140

6. Self-focusing of electromagnetic waves in a degenerate electron-hole plasma

   • M. S. Sodha
   • S. C. Kaushik
   • V. K. Tripathi

   Contributed Papers Pages: 141 - 148

7. Near field of a loaded circular toroidal antenna

   • Hsi-Tien Chang

   Contributed Papers Pages: 149 - 154

8. Positron lifetimes in five phases of BEA

   • W. W. Walker
   • E. L. Mueller III

   Contributed Papers Pages: 155 - 158

9. An improved wave function for positronium hydride: Preliminary report

   • Peter Nevin
   • D. M. Schrader
   • C. F. Lebeda

   Letter Paper Pages: 159 - 160

10. Forthcoming papers

    Abstract Pages: A161 - A163

11. Book reviews

    • H. K. V. Lotsch
    • E. C. Curtis
    • H. Welling

    BookReview Pages: A164 - A164