1905. No edition remarks. 88 pages. No dust jacket. Black and white diagrams throughout. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Binding remains firm. Minor pencil inscription to front free endpaper. Boards have moderate shelf wear with mild bumping and fraying to corners and crushing and fraying to spine ends. All surfaces heavily tanned, particularly spine. Some additional moderate marks and staining. Boards are slightly bowed.