This is Volume VII of eighteen in a series on the Sociology of Work and Organisation. First published in 1954, this study deals with certain aspects of the industrial mobility of adult male workers in Dagenham and in Battersea. The large national and the small local investigation are, however, mutually complementary. National policies must be applied locally; and labour mobility, or immobility, results from innumerable decisions made by individuals whose lives and attitudes reflect the peculiarities of the environment in which they live and work.