1958. 7th Edition. 584 pages. No dust jacket. Red cloth boards with gilt lettering. Contains black and white illustrations and folded diagram. Clean pages and illustrations with noticeable tanning and foxing throughout. More pronounced to free endpapers and pastedowns. Pencil and pen markings to front free endpaper. Moderate tape marks to pastedowns and free endpapers. Bookseller sticker stuck to front pastedown. Hinges are moderately cracked with exposed netting. Binding remains firm. Boards have moderate edge-wear with bumping to corners and rubbing to surfaces. Gilt lettering is darkened. Moderate sunning to spine and edges with crushing to spine ends. Minor splits to spine ends and corners causing cloth to be frayed. Visible wear marks to boards.