25 AUGUST 1923, Page 23

Ltd. 5s.) When we are directed to meditate upon our

latter end it is usually understood that it is the probable state of our souls at the time of death which requires our attention rather than the particular illness which is finally to dissolve the union of body and spirit. However, if for a moment we interpret the invitation in the more material sense, we shall discover that, should we survive beyond the age of thirty-five, one man in every seventeen of us will die of cancer, and one woman in every twelve. The author of Theories and Problems of Cancer supposes that we might care to take an intelligent interest in the disease which is likely to kill so many of us, if not entirely with cold scientific detachment, in any case with the intention that research into the causes and cure of malignant disease shall command our practical support. Dr. Walker is a dis- tinguished cytologist of established reputation, and he has written this book for the general public in clear and non- technical terms. It is full of interest for the scientist and layman alike.