a great part in causing the spread of tuberculosis. and a part perhaps as important as the inhalation of the bacillus of Koch. The book was written to show what means have been adopted for the prevention of the disease and to supply the evidence necessary to appraise these at their proper value. After a preliminary chapter on the etiology of tuberculosis in its social aspects the author gives an account ofipulmonary tuberculosis in its relations to the conditions of work in England. He then

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... ribes the German sanatoriums," the way in which the money is provided for their support, and the manner in which they are managed. In the last chapter he insists on the necessity from a national point of view of the establishment of sanatoriums in France. Amongst the appendices there is a rather curious document called a " catechism against tuberculosis " which has been drawn up by one of the local sections of the " Ligue Nationale Belge contre la Tuberculose." This catechism teaches as articles of obligation that 90 per cent. of the total number of cases of tuberculosis are derived from infected sputa and that tuberculosis is curable, but that the cure is difficult and can only be carried out under special conditions, that neither the rich nor the poor can carry out the<e conditions at home-that the cure can only be effected at "special establishments." " The case for sanatoriums does not need, and will be prejudiced by, such statements. The book itself is well written, the facts are clearly stated, and the arguments founded on them are logical. It should be read by everyone interested in the subject-and it is a subject of universal concern.