ENGINEERING covers such a wide field that students find little time available for courses which are outside the main scope of its studies. It can be argued that it is of benefit to those pursuing any vocational training to study some subject which tends to widen their interests, and from this point of view geology has many advantages, since most engineers are brought face to face with its teachings in areas and countries to which their vocation leads them. For this purpose the subject should be presented in an interesting form relieved so far as possible from the jargon which has gathered around it, in common with every other scientific subject at the present day. A Geology for Engineers By F. G. H. Blyth. Pp. viii + 302 + 16 plates. (London: Edward Arnold and Co., 1943.) 21s. net.