1925. No Edition Remarks. 431 pages. No dust jacket. Red cloth covered boards with gilt. Black and white diagrams throughout. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Some page corners folded. A previous owner's name to front free endpaper. Boards have heavy shelf wear with bumping and fraying to corners and crushing and fraying to spine ends. All surfaces heavily tanned, particularly spine. Gilt lettering to spine is slightly dulled. Some additional heavy marks and staining to surfaces. Book has slight forward lean.