This book represents nine years of study of asthma by the author, and is chiefly a support of his nonpassive expiration theory. In a foreword to the book, Dr. George Dock states that he has been much impressed by the accuracy of the author's clinical work and by the fulness and symmetry of the literary production. He says further, "The student and the practitioner can find in this book a true picture of the previous speculations and present knowledge of asthma expressed clearly and concisely...."
Dr. Brown's introductory chapter is most interesting. He outlines his method of study, and follows with a short chapter on the definition of the disease. The third chapter, which is perhaps one of the most important in the book, concerns historical observations and theories. There are 470 references to original articles on this subject, and practically every known theory as to the causation of this