Any one who has been fortunate enough to read the first edition of this book (1941) will be pleased to know that in the second edition the author has expanded the book from 187 to 237 pages. He has enlarged certain portions of the text and has corrected any errors that he has discovered or that have been brought to his attention. He fortunately has had a fine response from his readers and has received many constructive suggestions which have been followed. However, he has not departed from his original plan of writing a book which is aimed at increasing the clinical skill of the anesthesiologist without necessarily preparing him for examinations. Well written books devoted to one subject are valuable; however, when a second edition appears, it has all the advantages of containing not only the opinions of the author but those of a great many of his readers.