1921. Second Edition. 306 pages. No dust jacket. Red cloth. Contains fold-out illustrated diagrams throughout. Pages are moderately tanned and foxed throughout. Cracking to gutters of a few pages with exposed binding. Fold out plates are moderately tanned with some heavier tanning to edges, scuffing and tearing. Cracking to hinges with exposed binding. Binding is slightly shaky. Boards have moderate edge wear with bumping to corners and rubbing to surfaces. Crushing to spine ends with small splits and fraying to cloth. Scuffing and light marking overall. Notable sunning to spine and edges. Blue stained marking to front board.