Shaw's Textbook of Gynæcology

be disappointed to find that the work reported is now two years old. The book contains a series of 55 separate papers which are collected under ten different sub-titles. The first four titles deal with the regulation of growth and differentiation, the fifth concerns 'Biological Interactions in Carcinogenesis', the sixth group of papers deals with 'Interactions of Cells and Tissues in Organised Systems', and the seventh with 'Enzyme Patterns in Growth and Differentiation'. The eighth group covers the 'Systemic Aspects of Neoplastic Disease' while the last two subheadings deal with invasion and metastasis. Full references are quoted at the end of each paper, while after each group of papers there is an account of the discussion which followed at the end of the session concerned. This volume, which is well-printed and produced to the usual high American standard, should be of the greatest interest to readers who are concerned with the mechanisms by which cancer cells live within and invade the normal tissues of the host. It will be a valuable reference book for the library, even though the reader who wishes to have up-to-theminute information will still need to attend meetings in person.