138 Lecture 8 
MR. CREASE: Mr. Weston is quite right to emphasize the difficulties that 
will arise in interpretation of internal wave effects on sound propagation. A 
good example of internal waves, disclosed by biological scatterers, is to be 
found in Lecture 16, and I agree again that slicks are often evidence of internal 
waves, although they might well be the result of convective processes. 
PROFESSOR R. E.H. RASMUSSEN asked whether the theory of internal waves 
in sea water was also applicable tothe atmosphere. He suggested that if such were 
the case, then the theory might be checked more easily by observations in the 
atmosphere. 
MR. CREASE: In reply to Professor Rasmussen, the internal was theory 
should be applicable in the atmosphere, but I would not expect verification to be 
any easier. 
