No coin nor oath required. For personal study only.
a basic knowledge of the principles of geophysical prospecting and an understanding of how geophysical methods can be used in problems of site investigation, geological structure, and prospecting for minerals.
If such a book is to be kept within reasonable bounds and price, examples of actual surveys must be severely curtailed, the emphasis being laid on the exposition of principles and basic techniques. The authors, who have been teaching geophysics for the M.Sc. degree for some ten years, have expounded the basic principles admirably. They have, however, pruned the applications too drastically, only providing three or four examples of actual surveys, and these are limited to the seismic and gravity methods. There are no examples of electrical resistivity 'prospecting' and none of magnetic surveys. Many useful references are given, and the reader can thus study actual surveys elsewhere, but, in the reviewer's opinion, the value of this book would have been even greater if some more surveys, including actual site investigations, had been described. This need have added only some 10-20 pages to the book.
After a general introduction, chapters 2 and 3 describe the resistivity method; here the treatment of vertical interfaces, which is often lackhg in other books, is dealt with fully. These are followed by two chapters on the seismic methods, including both refraction and reflection techniques. The latter is included for completeness and because it is the main tool in prospecting for oil. The civil engineer will find these first five chapters the most useful, while the geologist will also find them beneficial in such problems as the location of ground water and the study of drift deposits. The only conspicuous omission is of the "sparker"; this is unfortunate, as this technique of marine seismic reflection Surveying is becoming increasingly important and has already bcen used for engineering problems.
Chapters 6 and 7 deal with gravity and magnetic surveys, respectively and, as in the rest of the book,
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Jolin Jnincs Watcrston \viw born n t lklinl~~irgli in 181 I, the sisth son of Gcorgc \\rriterstoii, :I I\-cll-kiiown innnufncturcr of scaling ~v i i s . 'lllic gcncrnl public owcs no little debt to thc Wtitcrston fiiinily, for Jolin Jamrs's graiidmothcr was Ciithcriuc Siin~lci~~iin, sister of t lie