This book is a complete survey of the subject of gastroscopy. After a brief prelude of the historical periods and the principles underlying the design of a gastroscope, the author proceeds to the gastroscopic examination, bringing out clearly its indications and contraindications. In chapter IV he presents the results obtained and shows several excellent roentgenograms. His conclusions as to the results obtained, and the future of gastroscopy are those of one well acquainted with his subject. The book can be recommended to all interested in this phase of gastro-intestinal work.