1. Forthcoming papers

   Abstract Pages: A5 - A5

2. Analysis of liquid surface films by pulsed laser photoacoustic spectroscopy

   • M. W. Sigrist
   • Z. H. Chen

   Invited Paper Pages: 1 - 7

3. Thermal-wave detection and characterisation of sub-surface defects

   • P. M. Patel
   • D. P. Almond
   • H. Reiter

   Contributed Papers Pages: 9 - 15

4. Topographical studies of semiconductor surfaces by using a combined photo-acoustoelectric method

   • V. L. Strashilov
   • L. L. Konstantinov
   • O. Ivanov

   Contributed Papers Pages: 17 - 21

5. Opto-thermal study of the melting transition of benzophenone

   • R. E. Imhof
   • F. R. Thornley
   • D. J. S. Birch

   Contributed Papers Pages: 23 - 28

6. Frequency-dependent specific heat near the glass transition measured with the photoacoustic effect

   • B. Büchner
   • P. Korpiun

   Contributed Papers Pages: 29 - 33

7. A theory for the enhancement of the photoacoustic signals by volatile liquids

   • J. Srinivasan
   • R. Kumar
   • K. S. Gandhi

   Contributed Papers Pages: 35 - 41

8. Studies on the enhancement of photoacoustic signals from non-porous solids in the presence of volatile liquids

   • P. Ganguly
   • T. Somasundaram

   Contributed Papers Pages: 43 - 52

9. Photoacoustic signal enhancement

   • T. Ahmed
   • A. Biswas
   • K. W. Johnson

   Contributed Papers Pages: 53 - 56

10. Intracavity photoacoustic resonance spectroscopy of C₂H₄

    • J. Röper
    • G. Chen
    • P. Hess

    Contributed Papers Pages: 57 - 59