1949. Second Edition. 524 pages. No dust jacket. Green cloth with gilt lettering. Colour pictorial frontispiece. Black and white diagrams throughout. Light tanning to pages; more prominent to text block edges. Pen inscriptions to front pastedown and free endpaper. Gutters are occasionally cracked with the netting exposed but pages remain attached. Boards have minor corner bumping and edgewear with light scuffing overall. Ring mark to front board. Spine has light tanning with soft crushing to ends. Lettering remains bright and clear. Book has a visible forward lean.