The Library Shelf

From time to time there appears in all technical literature a work of outstanding merit which is welcomed enthusiastically by all who are striving to keep abreast of progress in modern developments. In the sphere of aerodynamics Professor Duncan's master hand has produced a book of this class. Since 1911 when Bryan's classic treatise on ‘Stability in Aviation’ appeared, there has been no major work devoted solely to stability and control. It has been possible in the intervening years to cover the known field of this subject in one or two chapters of more general works in aerodynamics. But during and since the late war knowledge and experience have expanded so greatly that a separate volume has become a necessity.