1937. No Edition Stated. 190 pages. No dust jacket. Blue cloth. Includes various diagrams. Includes photographic plates. Pages have slight foxing, tanning and minor thumbing. Foxing more noticeable towards the start and end of the book and on text block edges. Previous owner's inscription to front pastedown. Text block edges are a little tanned and foxed. Boards have some moderate edge wear, with slight bumping to corners and minor bumping to spine ends. Boards a little rubbed and marked overall. Slight water staining to spine. Some heavy sunning. Book has a moderate forward lean.