Nurses stand in a peculiar relation between the laity and the profession, and the question sometimes arises how far a little knowledge is a dangerous thing. Some nurses, as the one quoted in a recent communication to the British Medical Journal, evidently have suffered from a certain amount of knowledge of disease, not enough in amount, however, to be useful to them. This book may be said to be a small compendium of practice, exceedingly brief and hardly sufficient to guide even a nurse in actual practice, though one that will perhaps meet the natural desire of anyone who is anxious to know something about the various diseases. We notice some little inaccuracies, for example the definition of germs as being invariably of vegetable nature, all belonging to the order of fungi. The book is one that will do no harm in the hands of any intelligent, well-meaning nurse.