✍ Scribed by G.M. Leek
No coin nor oath required. For personal study only.
This is a relatively expensive book, of quite specific interests, and yet must appeal to a widely varying audience, both of practising non-destructive testers and scientific workers who are looking for techniques to carry out research measurements. Fortunately the editor has wide personal interests and has selected topics for this second volume which range well away from orthodox NDT areas. He has clearly persuaded the individual authors to adopt a regular pattern of describing their technique, applying it to specific examples and then indicating briefly, but mostly in concrete terms, how they see the future.
An underlying theme for all the contributions is the collection and presentation of data to give better information about the defects being observed. In several papers this requires a substantial background of mathematics. It will therefore lose a fraction of non-destructive testers. They should not be put off, however, because subsequent descriptions of the techniques and applications can be followed adequately without a full knowledge of the mathematics. Nevertheless, it is quite clear that a good understanding of the theory is necessary to extract the maximum from these newer techniques and approaches.
'Proton Radiography' (A. M. Koehler and H. Berger) gives good theoretical background with clear indication and illustration of its advantages over, for example, X-and Y-radiography. As the authors point out, the technique is strongly limited in the number of establishments possessing suitable accelerators. However, it is usually possible to get time on accelerators. The chapter on 'Information Theory Applied to Industrial Radiography' (R. Halenshaw) I found less useful. It seemed to me rather like forcing the mathematical treatment unnecessarily and did not get us much further into industrial radiography. 'Computer and Optical Processing of Pictures' (C. J. Taylor and B. R. Pullan) was linked to the previous chapter but was much more specific in driving home methods for selecting and 235 Applied Acoustics (7) (1974)--
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