1932. Reprinted. 302 pages. No dust jacket. Green cloth covered boards. Black and white photographs and diagrams. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Dedication to front free endpaper. Boards have heavy shelf wear with bumping and fraying to corners and crushing and fraying to spine ends. All surfaces tanned and sunned, particularly spine. Some additional marks and staining to surfaces. Boards are slightly bowed.