1948. Ninth Edition. 362 pages. No dust jacket. Blue cloth with black lettering. Black and white tables, diagrams and photographic plates throughout with pull-out diagrams to rear of book. Slight cracking to hinges, with exposed netting, pages remain attached.Pages have light tanning and foxing throughout. Tables, diagrams and plates are bright and clear, with some light tanning and foxing to edges. Previous owner's inscriptions to front free endpaper. Tape marks to endpapers. Ink marks to bottom edge of text block. Boards have light shelf-wear with corner bumping. Light sunning to spine with crushing to ends. Small stain to rear board. Wear marks overall. Book has slight forward lean.