No Edition Remarks. 159 pages. No dust jacket. Grey cloth covered boards. Black and white diagrams. Black and white frontispiece. Pages with some foxing and tanning, particularly to endpapers and textblock edges. Some cracking to gutters with exposed netting. Binding loose. Some marginalia and underlining. A previous owner's name 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 tanned and sunned, particularly spine. Ring stain on front.