FIRST published in 1928 and now already appearing in its third edition, this text-book has fully proved its adequacy for the purpose for which it was written. This was to present the fundamental principles which apply to the moving parts of machines in a sufficiently comprehensive manner to satisfy the requirements of those studying for the engineering degree or for the examinations of the engineering institutions. The line taken by the author was to develop the theory of machines in logical sequence from the well-known principles of mechanics, of which a summary was given in the first chapters. That the third edition exhibits no substantial change in the structure of the book, beyond a number of additions made necessary by the increasing scope of the examination syllabuses, is evidence of the sufficiency of this method of presentation.
Principles of Mechanism
By F. Dyson. Third edition. Pp. vii + 364. (London: Oxford University Press, 1939.) 12s. net.