
The most readable survey of the theoretical core of current knowledge available, fully correlated with experimental material. The author gives a concise account of the classical theory necessary to an understanding of the subject, considers how this theory has been extended to...

The theory of the propagation of waves in solids was developed during the 19th century but, in the first quarter of this century, it fell into neglect. Only recently, as the result of new techniques of study and the development of new plastics and other such materials, has it...