Frühdiagnose der Lungentuberkulose des Erwachsenen.

This small work is devoted to the diagnosis, by physical and laboratory methods, of pulmonary tuberculosis in the adult. The various methods of examination are given in a thorough manner but nothing particularly new is offered. The opening pages, however, present much discussion of pathology. The author is convinced of the benign character of many apical tuberculous lesions and quotes figures which seem to bear out his opinion. For instance, he gives the data of Braeuning, who found that in his cases of closed tuberculosis of the first stage, tuberculosis of the progressive type had developed after one year in only 0.9 per cent, after three years in 2.6 per cent, and after seven years in 7.8 per cent. Tuberculosis in the adult has changed during these last years in that, whereas "middle field" tuberculosis was not frequently seen, it is now seen often. This middle field lesion is characterized