Methodik des Optischen Raumsinnes und der Augenbewegungen

442 BOOK NOTICES

Honor to his comrade. This book isdedicated to General Theodore CharlesLyster, who first entered a new field ofpractical research in creating aviationmedicine. General Lyster received the Dis­tinguished Service Medal largely forcreating the Flight Surgeon. When theaviation service became of supreme im­portance to the combatants in the WorldWar, General Lyster directed the educa­tion of the medical profession .to choose,among the host of applicants, those bestfitted for flying; and Isaac H. Jonestravelled over the country instructing oto­laryngologists in the Barany tests of.equilibrium, to fit for "blind flying."

This book is well named, for it givesbrief glimpses of this swiftly growing de­partment of human knowledge. The chap­ter headings are: Flying and the pilot him­self; The aviation examinations; The eye;The ear, a dual sense-organ; Blind flying;General medical examinations; The aircommutor (suggestions for passengers).Under the heading, Aviation medicine, thebackground, five chapters are devotedmore directly to history. The incidents ofwhich it tells are well illustrated by Dr.Tones's first meeting with General Gorgas:'''It was in his hotel bedroom that I met'Doctor' Gorgas for the first time. Dr.Lyster and I had just finished writing theA.G.O. 609 (Instructions for standardtests of the aviation examinations). Dr.Gorgas said 'Theo, I need you with me inWashington.' He then turned to me andsaid: 'Lieutenant, you will take over thework of recruiting for aviation.' " It mustbe remembered that General Lyster hadserved with Surgeon-General Gorgas inPanama, and was already entitled to hon­orable retirement in the Army MedicalCorps.

This book should be known to theophthalmologists and otologists of ourday.

Edward Jackson

METHODIK DES OPTISCHENRAUMSINNES UND DER AU­GENBEWEGUNGEN (Methods ofstudy of the optic sense of space andof ocular movements). By ArminTschermak-Seysenegg, Prague. Beingpart 6, no. 10 (conclusion) of section 5of Handbuch der biologischen Arbeits­methoden, edited by Dr. Emil Abder­halden. 355 pages, together with table ofcontents for this volume and some otherparts of section 5 of the series. With 88reproductions in the text. Paper covers.Berlin and Vienna, Urban & Schwarz­enberg. Price RM 20.00.

This efficient but extremely technicalmonograph is destined for use by the re­search worker rather than by the averageophthalmologist. It lays particular stressupon the necessity for clear distinctionbetween objective external space and thesubjective sensation and idea of space; be­tween motility and sensitivity; betweenocular movements and perspective. Chap­ter after chapter is devoted to the mostdetailed consideration of technique and itsinstrumentarium, from complete fixationof the subject's head and of the directionof gaze, through testing of sensory andmotor orientation in space and specialmethods of testing binocular vision, downto a study of stereoscopy and the tech­nique of examination and analysis ofmonocular and binocular movements.

A satisfactory subject index is ap­pended. Many references to the literatureof the subject are given, chiefly as foot­notes. The very numerous and well­printed illustrations are partly taken fromother authors and partly original withTschermak-Seysenegg.

W. H. Crisp