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Preface to the Fourth Edition
The first as well as the second (SI/Metric) editions of this book, published in 1974 and 1978, respectively,
were prepared for use as a text for an undergraduate course in continuum mechanics. The third edition,
published in 1994, broadened the coverage of the earlier editions so that it could be used as a text for a
one- or two-semester graduate course in continuum mechanics. In this fourth edition, the coverage is further
broadened so that it may be used as a text for a one- or two-semester graduate course in either continuum
mechanics or theory of elasticity. In the following, we list the additions and changes to the third edition:
n Seven new appendices are included in this new edition: (1) derivation of the necessary and sufficient condi-
tions for patibility, (2) on positive def