The Psychology of Industry: By James Drever, M.A., B.Sc., D.Phil. (Methuen and Co., London, 1921. Pp. vii + 141. Price 5s.)

'This little book is intended not so much for the student of psychology as for the ordinary man' and we might add is written from the standpoint of the experimental psychologist. Three aspects of the problem are outlined; the first concerns the worker (his character, intelligence, vocational fitness, etc.), the second the work (fatigue and output in relation to rest periods, ventilation, lighting, economy of movement), the third concerns the market (supply and demand from the psychological standpoint). The second aspect is dealt with at some length and repays careful reading.

The industrial psychologist may approach his problem in two ways; he may start from the details of the work to be done: for example from the question, 'How quickly, how accurately can this person tap keys?' he formulates tests and from their results can hazard a guess whether a girl will be a good typist. Or he may approach the problem from the other end and start, not from the details of the work, but from the energy sources of the worker's life, from the libido, and then try to place the worker in such a position that his libido may be