The standard of Volume V of this series is equal to that of the previous volumes. Its contents embrace an article by H. Mackenzie on the "Physical Signs of the Lungs and Heart;" "Artificial Aerotherapeutics," by C. T. Williams; "Asthma and Hay Fever," by Goodhart and E. I. Spriggs; "Bronchitis," by William Ewart; "Pneumonia," by Beddard, Eyre and Fawcett; "Abscess and Gangrene," by J. J. Perkins, and "Pulmonary Tuberculosis," by Kidd, Bulloch and Bardswell. A. E. Wright, Allbutt, Hutchison, Garrod, French, Muir and S. Mackenzie are some of those who take part in the discussion of the disorders of the blood. The affections of the pleura, mediastinum and thymus are also considered. Needless to say, the entire copy of the previous editions has been revised and rewritten with the view to making this system authoritative. We commend particularly the splendid list of references appended to each subject, which can not